N-Linked glycosylation of a baculovirus-expressed recombinant glycoprotein in insect larvae and tissue culture cells
|
|
- Brianna Elliott
- 5 years ago
- Views:
Transcription
1 Glycobiology vol. 8 no. 7 pp , 1998 N-Linked glycosylation of a baculovirus-expressed recombinant glycoprotein in insect larvae and tissue culture cells Peter C.Kulakosky, Patrick R.Hughes and H.Alan Wood 1 Boyce Thompson Institute for Plant Research, Tower Road, Ithaca, NY , USA Received on November 24, 1997; revised on January 16, 1998; accepted on January 16, To whom correspondence should be addressed The potential of insect cell cultures and larvae infected with recombinant baculoviruses to produce authentic recombinant glycoproteins cloned from mammalian sources was investigated. A comparison was made of the N-linked glycans attached to secreted alkaline phosphatase (SEAP) produced in four species of insect larvae and their derived cell lines plus one additional insect cell line and larvae of one additional species. These data survey N-linked oligosaccharides produced in four families and six genera of the order Lepidoptera. Recombinant SEAP expressed by recombinant isolates of Autographa californica and Bombyx mori nucleopolyhedroviruses was purified from cell culture medium, larval hemolymph or larval homogenates by phosphate affinity chromatography. The N-linked oligosaccharides were released with PNGase-F, labeled with 8-aminonaphthalene trisulfonic acid, fractionated by polyacrylamide gel electrophoresis, and analyzed by fluorescence imaging. The oligosaccharide structures were confirmed with exoglycosidase digestions. Recombinant SEAP produced in cell lines of Lymantria dispar (IPLB-LdEIta), Heliothis virescens (IPLB-HvT1), and Bombyx mori (BmN) and larvae of Spodoptera frugiperda, Trichoplusia ni, H.virescens, B.mori, and Danaus plexippus contained oligosaccharides that were structurally identical to the 10 oligosaccharides attached to SEAP produced in T.ni cell lines. The oligosaccharide structures were all mannose-terminated. Structures containing two or three mannose residues, with and without core fucosylation, constituted more than 75% of the oligosaccharides from the cell culture and larval samples. Key words: alkaline phosphatase/autographa californica nucleopolyhedrovirus/baculovirus/bombyx mori nucleopolyhedrovirus/lepidoptera Introduction Insect cells infected with recombinant baculoviruses are useful for expressing recombinant proteins particularly when high production levels, secretion and posttranslational modifications of the protein are desired (Luckow, 1995; Shuler et al., 1995). There is special interest in the potential of insect cells to produce recombinant vertebrate glycoproteins with oligosaccharides similar to the original proteins, a feature lacking with many other expression vector technologies. Information available to date 1998 Oxford University Press suggests that the processing of N-linked oligosaccharides on recombinant proteins produced in insect cells differs from that of the same protein produced in the vertebrate cells of their origin or in vertebrate cell culture expression systems (März et al., 1995). Most mammalian recombinant glycoproteins produced by baculovirus expression vectors in insect cell culture are produced with mannose-terminated oligosaccharides or otherwise less complete oligosaccharides compared to the native protein produced in the original tissue (reviewed in Luckow, 1995; März et al., 1995). There are notable exceptions to this in a few reports of recombinant proteins produced with small amounts of oligosaccharides terminated with hexosamine and galactose, such as plasminogen (Davidson et al., 1990; Davidson and Castellino, 1991a,b), interferon (Ogonah et al., 1996) and IgG (Hsu et al., 1997). Sialic acid residues on N-linked oligosaccharides have been reported only for recombinant plasminogen produced in insect cell culture (Davidson et al., 1990, 1991; Davidson and Castellino, 1991a,b) and SEAP produced in insect larvae (Davis and Wood, 1995). Although a large number of recombinant glycoproteins have been produced with the baculovirus expression system, variation in the glycoprotein processing by different insect cell lines has not been studied systematically. Since both the intrinsic structure of glycoprotein and the cell type in which it is expressed can have a profound influence on the final oligosaccharide attached, a more systematic approach will be required to predict which insect cell lines will be most useful for the production of glycoproteins. Lepidopteran larvae are also useful for baculovirus-driven expression of recombinant proteins and have been reported to carry out recombinant protein modifications that are not performed in cell culture (Luckow, 1995). Davis and Wood (1995) reported that Trichoplusia ni larvae produce recombinant SEAP with sialic acid residues, but there has been no comparison of susceptible insect species for their capacity to glycosylate recombinant proteins. In a previous publication (Kulakosky et al., 1998), we compared N-linked glycosylation of SEAP (Davis et al. 1992) by three insect cell lines. SEAP produced in mammalian cells normally has oligosaccharides that are sialylated (Takami et al., 1988; Chuang, 1989). However, SEAP produced by the T.ni (BTI-Tn-5b1 4 and TN368) and the Spodoptera frugiperda (Sf21) cell lines only had oligosaccharides with terminal mannose residues. Both T.ni cell lines produced large amounts of oligosaccharides with two or three mannose residues, lacking terminal α1,3-linked mannose. However, the oligosaccharides attached by Sf21 cells do not contain the two or three mannose residue structures which lacked α1,3 terminal linkages. In this article we have used SEAP as a model glycoprotein to investigate the potential of several additional insect cell lines as well as insect larvae to glycosylate recombinant proteins. By comparing samples produced in cultured cells and larvae of the same species, we explored whether the variability in glycosylation of a recombinant protein with different cells arises because of tissue 741
2 P.C.Kulakosky, P.R.Hughes and H.A.Wood diversity within an insect, or from differences between insects in their basic glycoprotein processing machinery. In addition, we compared SEAP oligosaccharides produced in tissue culture cells and larvae infected with a recombinant BmNPV with samples produced using a recombinant AcMNPV. Results We analyzed the oligosaccharides attached to SEAP produced in several insect cell lines in order to evaluate the range of differences in glycoprotein processing and to compare the data with previously observed differences in N-linked oligosaccharides on SEAP produced in S.frugiperda and T.ni cell cultures. The oligosaccharides on SEAP produced in Sf21 and BTI-Tn-5b1 4 cell lines are shown in Figure 1 along with their previously determined structures (Kulakosky et al., 1998). The oligosaccharides from SEAP produced in cell lines derived from Heliothis virescens, Lymantria dispar, and Bombyx mori are shown in Figure 2. There was a remarkable similarity in the SEAP oligosaccharides synthesized in cell lines from five species in five genera and three families. Following incubation with jack bean mannosidase, all of the SEAP oligosaccharides from these cells were digested to two structures, Man1,4GlcNAc1,4GlcNAc or Man1,4GlcNAc1,4(Fuc1,6)GlcNAc. The sextasaccharide band contained trimannose, core-fucosylated (70 90%) and tetramannose (10 30%) structures. The SEAP oligosaccharides produced in H.virescens, L.dispar, and B.mori cell lines were qualitatively identical to those produced in T.ni cell lines. Only the Sf21 cell line produced SEAP without the shorter di- and trimannose oligosaccharides lacking terminal α1,3-linked mannose (Figure 1) (Kulakosky et al., 1998). Previous studies (Kulakosky et al., 1998) showed that Sf21 cells produce the largest proportion of SEAP oligosaccharides larger than trimannose (27%). The BmN and LdEIta cells produced the lowest amount of these oligosaccharides (12%). The BmN, HvT1 and LdEIta cells produced SEAP with 49%, 55%, and 62% core-fucosylated oligosaccharides, respectively. The TN368, Tn5-b1 4, and Sf21 cells produce 2%, 19%, and 49% core fucosylated oligosaccharides. All the cell lines produced more SEAP oligosaccharides containing six mannose residues than five or seven mannose residues. We were able to obtain and infect several lepidopteran species reported to be susceptible to AcMNPV or BmNPV. The level of SEAP from the perfused hemolymph of these larvae varied greatly (Table I). Although susceptible to AcMNPV, the perfusates from Helicoverpa zea, L.dispar, Pseudaletia unipuncta, and Manduca sexta larvae contained only small amounts of recombinant SEAP and were not further analyzed. SEAP samples harvested from T.ni, S.frugiperda, B.mori, Danaus plexippus, and H.virescens larvae (Figure 3) contained N-linked oligosaccharides that were similar to those produced by all of the tested cell lines, except Sf21 (Figures 1 and 2). Like the cell samples, all of the larval oligosaccharides were reduced to the gel mobility of the tri- or tetrasaccharide standards following digestion with jack bean mannosidase. The SEAP produced in T.ni and S.frugiperda larvae had proportions of higher mannose oligosaccharides (larger than Man1,3(Man1,6)Man1,4GlcNAc1,4(Fuc1,6)Glc- Nac1,4) similar to their corresponding cell lines (19% and 15%, respectively). The B.mori, H.virescens, and D.plexippus larvae produced relatively low proportions (0.5, 5.5, and 9.2%, respectively) of these larger oligosaccharides. 742 Fig. 1. SEAP oligosaccharide profile and structures produced in BTI-Tn-5b1 4 (T.ni) and IPLB-SF-21A (Sf21) tissue culture cells. Asterisk denotes unbranched structures. Arrows on the right indicate positions of glucose polymer standards. Table I. Concentration of SEAP harvested by perfusion Species No. of larvae Mean µg/larva Danaus plexippus ± 93.9 Pseudaletia unipuncta ± 2.5 Heliothis virescens ± 97.1 Helicoverpa zea ± 0.5 Trichoplusia ni ± 45 Lymantria dispar ± 2.5 Bombyx mori ± 23.3 Manduca sexta ± 12.2 Spodoptera frugiperda (pooled sample) The profile of SEAP oligosaccharides from B.mori larvae was distinct, having a high proportion of very small oligosaccharides. The only oligosaccharides produced in significant quantities were trimannose, dimannose, and dimannose fucosylated structures. These oligosaccharides were devoid of terminal α1,3-linked mannose and differed from the oligosaccharides produced in BmN cells (Figure 2), which were typical of the other insect larvae and cell lines. Similarly, the S.fugiperda larvae also produced oligosaccharides which differed from the oligosaccharides produced by their derived cell line, Sf21.
3 Glycosylation in Lepidoptera neuraminidase inhibitor, 2,3-dehydro-2-deoxy-N-acetylneuraminic acid. To investigate further the possible occurrence of sialylated oligosaccharides, two additional protein harvesting procedures were used perfusion of larvae with saline containing 2,3-dehydro-2-deoxy-N-acetylneuraminic acid and homogenization of larvae, followed by protein purification. The oligosaccharide profile from these samples was identical to samples purified in the absence of the neuraminidase inhibitor. Incubation of both types of samples with jack bean mannosidase yielded the expected products for mannose terminated oligosaccharides. Furthermore, no new bands were detected following incubation with neuraminidase, indicating the absence of sialylation. Fig. 2. Oligosaccharide profile from SEAP produced in Bombyx mori (BmN), Heliothis virescens (HvT1), and Lymantria dispar (LdEIta) tissue culture cells. The HvT1 and LdEIta cells were infected with the recombinant AcMNPV, and the BmN cells were infected with recombinant BmNPV expressing the SEAP gene. Arrows indicate positions of glucose polymer standards. Fig. 3. Oligosaccharide profile of SEAP produced in Trichoplusia ni (Tn), Spodoptera frugiperda (Sf), Heliothis virescens (Hv), Danaus plexippus (Dp) and Bombyx mori (Bm) larvae. The Bm larvae were infected with recombinant BmNPV, and the remaining larvae with recombinant AcMNPV expressing the SEAP gene. Arrows indicate positions of glucose polymer standards. Except for B.mori samples, all the larval samples contained large amounts of fucosylated oligosaccharides (T.ni, 42%; D.plexippus, 50%; S.frugiperda, 55%; H.virescens, 60%). The B.mori larval samples contained only 17% fucosylated oligosaccharides. Samples produced in the L.dispar, H.virescens, and B.mori cell lines contained 62%, 55%, and 49% fucosylated oligosaccharides, respectively. The result with T.ni larval SEAP oligosaccharides (Figure 3) contrasts with a previous result from this laboratory (Davis and Wood, 1995) in which Sambucus nigra agglutinin lectin blotting indicated the presence of sialylated SEAP oligosaccharides. These lectin blots were performed with immunoprecipitated material from infected larvae homogenized in the presence of the Discussion There was a remarkable similarity in the composition of SEAP oligosaccharides produced in cell lines and larvae from six genera in four families. The cell lines that we investigated were isolated from a variety of tissue types embryonic (BTI-Tn-5b1 4, Granados et al., 1994; IPLB-LdEIta, Lynn et al., 1988), pupal ovarian (TN368, Hink, 1970), unspecified ovarian (BmN, Maeda, 1984), imaginal disks (Sf21, Vaughn et al., 1977), and larval testicular sheath (IPLB-HvT1, Lynn et al., 1988). These cell lines are composed of dedifferentiated cells. Most baculovirus replication in larvae occurs in the fat body cells, and it is therefore assumed that most of the SEAP was produced in this differentiated cell type. Clearly, phylogenetic divergence, tissue origin, and state of cellular differentiation did not result in major differences in the glycosylation of SEAP. The constant nature of the oligosaccharide structures suggests that (1) insect cells from widely divergent insect species and their derived cell cultures have similar potential for processing recombinant proteins, (2) the recombinant protein itself is the overriding determinant in processing events, and/or (3) baculovirus infection alters the secretory pathway in a way that limits the glycosylation potential of insect cells for N-linked glycosylation. The processing of N-linked oligosaccharides of SEAP by Sf21 cells (Figure 1) was unique, producing considerably higher levels of oligosaccharides with terminal α1,3-linked mannose (Kulakosky et al., 1998) than any of the other cell culture or larval samples, including the S. frugiperda larval samples. This results in SEAP samples from Sf21 cells lacking the three smallest oligosaccharides produced in other cells (Figure 1). This difference could arise because Sf21 cells were derived from parental tissue that exhibit tissue-specific regulation of glycosylation or may have mutated in culture resulting in a reduction or loss of α1,3 mannosidase activity. The other notable difference between samples from larvae and their derived cell lines is that of SEAP produced in B.mori larvae (Figure 3). The B.mori larval samples contained extremely low amounts of oligosaccharides with four to seven mannose residues as compared to SEAP samples from all other larval and cell culture samples. The largest SEAP oligosaccharides produced in significant quantities by B.mori larvae were dimannose, fucosylated and linear trimannose with virtually no terminal α1,3-linked mannose. Using the baculovirus expression vector system with B.mori larvae, Hogeland and Deinzer (1994) found that the predominant oligosaccharide on recombinant interleukin-3 was Man1,6Man1,4GlcNAc(Fuc)1,4GlcNAc. In the case of SEAP, this structure, with and without the fucose residue, accounted for 37% and 40%, respectively, of the oligosaccharides produced in B.mori larvae. These data suggest that B.mori larval cells may express high levels of an α1,3 mannosidase. 743
4 P.C.Kulakosky, P.R.Hughes and H.A.Wood This laboratory previously reported (Davis and Wood, 1995) that SEAP oligosaccharides produced in T.ni larvae contained sialic acid residues. These findings were based on positive Sambucus nigra agglutinin lectin blots of a 64 kda, immunoprecipitated protein separated by sodium dodecyl sulfate polyacrylamide gel electrophoresis. The results of the current study revealed no evidence of sialic acid terminated oligosaccharides from SEAP purified from T.ni larvae. This discrepancy could arise in at least two ways. First, the immunoprecipitation may have precipitated another sialylated glycoprotein with a molecular weight of 64 kda. Secondly, lectin blot detection is not quantitative, and a very minor sialylated oligosaccharide component of SEAP could be responsible for the positive reaction. Such a minor component could have been produced in tissues other than the fat body cells that produce most of the SEAP in larvae. Because of the quantitative properties of FACE analyses, we now know that, if sialylated SEAP oligosaccharides are produced in insect cells, they occur in very low proportions, a fact not discernible from the lectin blotting data. Based on this survey of SEAP glycosylation in a wide range of lepidopteran larvae and tissue culture cells, the potential for lepidopteran cells to process oligosaccharides in a manner similar to mammalian cells is questionable. However, the limited variation in SEAP processing may be a result of the properties of SEAP rather than cellular determinants. To investigate this question, an evaluation of the oligosaccharide processing of additional glycoproteins in several lepidipoteran larvae and tissue culture cells will be required. Materials and methods Insect cell culture BmN cells (Maeda, 1984) were obtained from Susumu Maeda (Department of Entomology, UC-Davis). The HvT1 cells (Lynn et al., 1988) were supplied by Dwight Lynn (USDA ARS, Beltsville, MD). The LdEIta (Lynn et al., 1988) were obtained from R. Granados (Boyce Thompson Institute). All cell lines were maintained in TNM-FH medium (Graces insect cell medium, Gibco, Grand Island, NY) containing 10% fetal bovine serum. Healthy cells were maintained at 27 C and infected cells at 28 C except for HvT1 cells, which were maintained 23 C. Insect larvae T.ni and D.plexippus were from colonies at the Boyce Thompson Institute. P.unipuncta were a gift from R. Granados (Boyce Thompson Institute). The H.virescens and H.zea were reared from eggs purchased from USDA-ARS (Stoneville, MS), and S.frugiperda were reared from eggs supplied by W. Deryck Perkins (USDA ARS Insect Biology Lab, Tifton, GA). M.sexta caterpillars were a gift from Ronald Booker (Department of Neurobiology & Behavior, Cornell University), and L.dispar larvae were a gift from Ann Hajek (Dept. of Entomology, Cornell Univ.). B.mori mulberry diet and eggs of the Kinshu Showa race were kindly provided by Yoshifumi Hashimoto (Kyoto Institute of Technology, Japan). All insect larvae were maintained on wheat germ diet (Bell et al., 1979) except B.mori, D.plexippus, and P.unipuncta, which were fed on commercial Morus spp. leaf-based diet, Asclepias curassavica, and Avena sativa seedlings, respectively. 744 SEAP production in larvae and cells Early fifth instar H.virescens, S.frugiperda, T.ni, D.plexippus and B.mori larvae were injected with the budded form of the recombinant viruses produced in tissue culture cells. Viral injections were performed with both fourth- and fifth-instar larvae of L.dispar, H.zea, M.sexta, and P.unipuncta. Hemocoel injections of AcMNPV were 10 6 PFU for T.ni and S.frugiperda, PFU for P.unipuncta, PFU for H.zea and H.virescens, and PFU for L.dispar, D.plexippus, and M.sexta larvae. The B.mori larvae were injected with between and PFU of BmNPV. The SEAP was harvested from the hemocoel of larvae by perfusion in order to minimize the release of cellular hydrolases during the sampling from larvae. When the larvae appeared moribund (minimal response to touching with a forceps or unable to right themselves when inverted), they were chilled on ice and perfused with a lepidopteran saline solution (Anderson and Telfer, 1969) containing 5 mm phenylthiourea (recrystallized from ethanol). The perfusion was carried out with cold saline from a syringe fitted with a suitable gauge (18 27) needle for a particular species. The chilled larvae were bled by one of two procedures. In the first procedure, they were injected posteriorly or anteriorly with the saline solution before cutting a proleg and then perfused until the perfusate was colorless. Alternatively, the larvae were injected at the anterior end with a small amount of saline and then perfused from the posterior end until the solution was colorless. The perfusate was collected in conical tubes containing a small amount of saline on ice. In specified experiments with T.ni larval samples, a sialidase inhibitor, 1 mm 2,3-dehydro-2-deoxy-N-acetylneuraminic acid (Boehringer Mannheim, Indianapolis, IN), was added to the perfusion solution. The perfusate was centrifuged for 5 min at 500 g. An aliquot of the supernatant was removed for enzyme assay and the remainder of the supernatant was stored at -70 C. For purification, the SEAP samples were thawed, centrifuged at 70,000 g for 2 h or 250,000 g for 30 min., and the supernatant was exchanged into affinity column buffer (20 mm Tris, 1 mm MgCl 2, ph 8.0) using Biogel P-6, P-10, or P-30 gel permeation columns (Bio-Rad Hercules, CA). The SEAP was then purified with affinity chromatography (Kulakosky et al., 1998). Homogenates of infected T.ni larvae were prepared in the lepidopteran saline solution containing 2 mm dithiothreitol and 2 mm 2,3-dehydro-2-deoxy-N-acetylneuraminic acid. Twentyfive larvae were homogenized with a Heat Systems homogenizer (Heat Systems, Plainview, NY) in 5 ml buffer. The homogenate was centrifuged at 500 g for 5 min in conical tubes and the supernatant solution was then centrifuged at 2000 g for 10 min. The resulting supernatant solution was stored at -70 C. For purification, the samples were thawed and centrifuged at 165,000 g for 2.5 h in a fixed-angle rotor. The supernatant solution was filtered through a Millex-PI 0.8 µm syringe filter (Millipore, Bedford, MA) before desalting on a Biogel P-30 column equilibrated in the affinity chromatography buffer. The SEAP was then purified by affinity chromatography (Kulakosky et al., 1998). Tissue culture cells in midexponential phase were infected with recombinant AcMNPV or BmNPV at a multiplicity of infection of 10 PFU per cell. SEAP expressed with the recombinant BmNPV (Huang et al., 1997) was produced in BmN cells, and the remaining cell lines were used to produce SEAP by infection with recombinant AcMNPV (Davis et al., 1992). At 4 7 days postinoculation, the cell culture medium containing SEAP was harvested, and the cellular debris was pelleted at 500 g for
5 Glycosylation in Lepidoptera 10 min. The virus in the cell culture medium was pelleted at 70,000 g for 2 h in a fixed-angle rotor. The supernatant was concentrated 2- to 3-fold by dialysis against polyethylene glycol (MW 15,000 20,000, Sigma, St. Louis, MO). The samples were then dialyzed against column buffer, 20 mm Tris, 1 mm MgCl 2, ph 8.0, and purified by phosphate affinity column chromatography (Kulakosky et al., 1998). Oligosaccharide analysis Characterization of the oligosaccharides attached to SEAP was conducted according to Kulakosky et al. (1998). Briefly, the oligosaccharides were released from the protein with PNGase-F and labeled with 8-aminonaphthalene trisulfonic acid (Molecular Probes, Eugene, OR). Samples were subjected to single or multiple digestion reactions containing jack bean mannosidase (Oxford GlycoSystems, Rosedale, NY) and bovine epididymus αl-fucosidase (Oxford GlycoSystems, Rosedale, NY) as previously described (Kulakosky et al., 1998). Digestions with neuraminidase (Oxford GlycoSystems, Rosedale, NY) were performed according to the manufacturer s recommendations. All digestions were carried out at 37 C for 24 h. Fractionation of the oligosaccharides was done on a Glyko (Novato, CA) apparatus and analyzed using a Glyko SE1000 FACE imaging system (CCD camera and image analysis software). Acknowledgments We acknowledge the outstanding technical assistance provided by Molly Ingersoll during this project. This research was partially supported by the National Science Foundation, Grant Number BES , and the National Aeronautics and Space Administration, Grant Number NAG Abbreviations AcMNPV, Autographa californica nucleopolyhedrovirus; BmNPV, Bombyx mori nucleopolyhedrovirus; FACE, fluorophore-assisted carbohydrate electrophoresis; HvT1, IPLB-HvT1; LdEIta, IPLB-LdEIta; PFU, plaque-forming units; SEAP, secreted human placental alkaline phosphatase; Sf21, IPLB- SF-21AE. References Anderson,L.M. and Telfer,W.H. (1969) A follicle cell contribution to the yolk spheres of moth oocytes. Tissue Cell, 1, Bell,R.A., Owens,C.D., Shapiro,M. and Tardif,J.R. (1979) Mass rearing and virus production. Development of mass-rearing technology. In Doane,C.C. and McManus,M.L. (eds.), The Gypsy Moth: Research Toward Integrated Management. Forest Serv. Tech. Bull., 1584, Chuang,N.N. (1989) A human placental sialidase with selective desialylation on 5 -nucleosidase and alkaline phosphatase. Bull. Inst. Acad. Sinica, 28, Davidson,D.J. and Castellino,F.J. (1991a) Asparagine-linked oligosaccharide processing in lepidopteran insect cells temporal dependence of the nature of the oligosaccharides assembled on asparagine-289 of recombinant human plasminogen produced in baculovirus vector infected Spodoptera frugiperda (IPLB-SF-21AE) cells. Biochemistry, 30, Davidson,D.J. and Castellino,F.J. (1991b) Structures of the asparagine-289-linked oligosaccharides assembled on recombinant human plasminogen expressed in a Mamestra brassicae cell line (IZD-MB0503). Biochemistry, 30, Davidson,D.J., Fraser,M.J. and Castellino,F.J. (1990) Oligosaccharide processing in the expression of human plasminogen cdna by lepidopteran insect (Spodoptera frugiperda) cells. Biochemistry, 29, Davidson,D.J., Bretthauer,R.K. and Castellino,F.J. (1991) α-mannosidase-catalyzed trimming of high-mannose glycans in noninfected and baculovirus-infected Spodoptera frugiperda cells (IPLB-SF-21AE). A possible contributing regulatory mechanism for assembly of complex-type oligosaccharides in infected cells. Biochemistry, 30, Davis,T.R. and Wood,H.A. (1995) Intrinsic glycosylation potentials of insect cell cultures and insect larvae. In Vitro Cell. Dev. Biol., 31, Davis,T.R., Trotter,K.M., Granados,R.R. and Wood,H.A. (1992) Baculovirus expression of alkaline phosphatase as a reporter gene for evaluation of production, glycosylation and secretion. Bio/Tech., 10, Granados,R.R., Guoxun,L., Derksen,A.C.G. and McKenna,K.A. (1994) A new insect cell line from Trichoplusia ni (BTI-Tn-5B1 4) susceptible to Trichoplusia ni single enveloped nuclear polyhedrosis virus. J. Invertebr. Pathol., 64, Hink,W.F. (1970) Established insect cell line from the cabbage looper, Trichoplusia ni. Nature, 226, Hogeland,K.E. and Deinzer,M.L. (1994) Mass spectrometric studies on the N-linked oligosaccharides of baculovirus-expressed mouse interleukin-3. Biol. Mass Spectrometry, 23, Hsu,T.A., Takahashi,N., Tsukamoto,Y., Kato,K., Shimada,I., Masuda,K., Whiteley,E., Fan,J.Q., Lee,Y.C. and Betenbaugh,M.J. (1997) Differential N-glycan patterns of secreted and intracellular IgG produced in Trichoplusia ni cells. J. Biol. Chem., 272, Huang,X.P., Davis,T.R., Hughes,P.R. and Wood,H.A. (1997) Potential replication of recombinant baculoviruses in nontarget insect species: reporter gene products as indicators of infection. J. Invertebr. Pathol., 69, Kulakosky,P.C., Shuler,M.L. and Wood,H.A. (1998) N-Glycosylation of a baculovirus-expressed recombinant glycoprotein in three insect cell lines. In Vitro Cell. Dev. Biol. Anim., 34, Luckow,V.A. (1995) Protein production and processing from baculovirus expression vectors. In Shuler,M.L., Wood,H.A., Granados,R.R. and Hammer,D.A. (eds.), Baculovirus Expression Systems and Biopesticides. John Wiley & Sons, New York, pp Lynn,D.E., Dougherty,E.M., McClintock,J.T. and Loeb,M. (1988) Development of cell lines from various tissues of Lepidoptera. In Kuroda,Y., Kurstak,E. and Maramorosch,K. (eds.), Invertebrate and Fish Tissue Culture. Springer-Verlag, New York, pp Maeda,S. (1984) A plaque assay and cloning of Bombyx mori nuclear polyhedrosis virus. J. Seric. Sci., Jpn., 53, März,L., Altmann,F., Staudacher,E., Kubelka,V. (1995) Protein glycosylation in insects. In Montreuil,J., Vliegenthart,J.F.G. and Schachter,H. (eds). Glycoproteins. Elsevier, Amsterdam, pp Ogonah,O.W., Freeman,R.B., Jenkins,N., Patel,L., and Rooney,B.C. (1996) Isolation and characterization of an insect cell line able to perform complex N-linked glycosylation on recombinant proteins. Biotechnol., 14, Shuler,M.L., Hammer,D.A., Granados,R.R. and Wood,H.A. (1995) Overview of baculovirus-insect culture system. In Shuler,M.L., Wood,H.A., Granados,R.R. and Hammer,D.A. (eds.), Baculovirus Expression Systems and Biopesticides. John Wiley & Sons, New York, pp Takami,N., Ogata,S., Oda,K. and Ikehara,Y. (1988) Biosynthesis of placental alkaline phosphatase and its post-translational modification of glycophospholipid for membrane-anchoring. J. Biol. Chem., 263, Vaughn,J.L., Goodwin,R.H., Tompkins,G.J. and McCawley,P. (1977) The establishment of two cell lines from the insect Spodoptera frugiperda (Lepidoptera:Noctuidae). In Vitro, 13,
Bombyx mori Nuclear Polyhedrosis Virus and Autographa californica Nuclear Polyhedrosis Virus
JOURNAL OF VIROLOGY, JUlY 1991, p. 3625-3632 0022-538X/91/073625-08$02.00/0 Copyright C) 1991, American Society for Microbiology Vol. 65, No. 7 Host Range Expansion by Recombination of the Baculoviruses
More informationTECHNICAL BULLETIN. R 2 GlcNAcβ1 4GlcNAcβ1 Asn
GlycoProfile II Enzymatic In-Solution N-Deglycosylation Kit Product Code PP0201 Storage Temperature 2 8 C TECHNICAL BULLETIN Product Description Glycosylation is one of the most common posttranslational
More information: LYMANTRIA DISPAR (L.) [1, 2],, [3]., Lymantria dispar (L.)
632.937.16:632.654,, ail@sibmail.ru,, ovp0408@yandex.ru, LYMANTRIA DISPAR (L.),,. Gypsy moth, nucleopolyhedrovirus, vertical transmission.. [1, 2],, [3]., (, - -, ), -. Lymantria dispar (L.) ( ):. - [1,
More informationCertificate of Analysis
Certificate of Analysis Human IgG Glycoprotein Standard Cat. #: GCP-IGG-50U Batch: B13T-06 Nominal size: 50μg Expiry: Dec 2020 Description: A glycoprotein standard for use during glycan release and labeling.
More informationIsomeric Separation of Permethylated Glycans by Porous Graphitic Carbon (PGC)-LC-MS/MS at High- Temperatures
Supplementary Information Isomeric Separation of Permethylated Glycans by Porous Graphitic Carbon (PGC)-LC-MS/MS at High- Temperatures Shiyue Zhou 1, Yifan Huang 1, Xue Dong 1, Wenjing Peng 1, Lucas Veillon
More informationEnzymatic Removal of N- and O-glycans using PNGase F or the Protein Deglycosylation Mix
be INSPIRED drive DISCOVERY stay GENUINE APPLICATION NOTE Enzymatic Removal of N- and O-glycans using PNGase F or the Protein Deglycosylation Mix Alicia Bielik and Paula Magnelli, New England Biolabs,
More informationMammalian-type Glycosylation l in LEXSY
Mammalian-type Glycosylation l in LEXSY Case Study: Recombinant hu Erythropoietin Jena Bioscience GmbH Loebstedter Str. 80 07749 Jena, Germany Tel.: +49-3641-628-5000 Fax: +49-3641-628-5100 628 e-mail:
More informationMass rearing lepidoptera with persistent baculovirus infections. Insect population dynamics are impacted by lethal and chronic infections
Mass rearing lepidoptera with persistent baculovirus infections Helen Hesketh & Rosie Hails Natural Environment Research Council (NERC) Centre for Ecology & Hydrology (CEH) Wallingford, UK Natural Environment
More informationDevelopment of a Novel Recombinant Influenza Vaccine in Insect Cells
Development of a Novel Recombinant Influenza Vaccine in Insect Cells Clifton McPherson New Cells for New Vaccines II September 18, 2007 cmcpherson@proteinsciences.com New Cell for New Vaccines II Topics:
More informationN-Glycosidase F Deglycosylation Kit
For life science research only. Not for use in diagnostic procedures. FOR IN VITRO USE ONLY. N-Glycosidase F Deglycosylation Kit Kit for the deglycosylation of asparagine-linked glycan chains on glycoproteins.
More informationPersistence of an Occlusion-Negative Recombinant Nucleopolyhedrovirus in Trichoplusia ni Indicates High Multiplicity of Cellular Infection
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Nov. 2001, p. 5204 5209 Vol. 67, No. 11 0099-2240/01/$04.00 0 DOI: 10.1128/AEM.67.11.5204 5209.2001 Copyright 2001, American Society for Microbiology. All Rights
More informationConstruction and Bioassay of Recombinant AcNPV Containing SpltNPV gp37 Fusion gene
Construction and Bioassay of Recombinant AcNPV Containing SpltNPV gp37 Fusion gene Chongbi Li 1, *, Zhaofei Li 2, Guanghong Li 2, Yi Pang 2 1 Biopharmaceutical Engineering Center of Zhaoqing University,
More informationHigh-Frequency Homologous Recombination between Baculoviruses Involves DNA Replication
JOURNAL OF VIROLOGY, Dec. 2003, p. 13053 13061 Vol. 77, No. 24 0022-538X/03/$08.00 0 DOI: 10.1128/JVI.77.24.13053 13061.2003 Copyright 2003, American Society for Microbiology. All Rights Reserved. High-Frequency
More informationNature Biotechnology: doi: /nbt Supplementary Figure 1. RNAseq expression profiling of selected glycosyltransferase genes in CHO.
Supplementary Figure 1 RNAseq expression profiling of selected glycosyltransferase genes in CHO. RNAseq analysis was performed on two common CHO lines (CHO-K1, CHO-GS) and two independent CHO-GS triple
More informationRelative Potency of Selected Nuclear Polyhedrosis Viruses Against Five Species of Lepidoptera 1,2
Relative Potency of Selected Nuclear Polyhedrosis Viruses Against Five Species of Lepidoptera 1,2 Robert R. Farrar, Jr. and Richard L. Ridgway 3 USDA, Agricultural Research Service, Insect Biocontrol Laboratory,
More informationGlycosylation analyses of recombinant proteins by LC-ESI mass spectrometry
Glycosylation analyses of recombinant proteins by LC-ESI mass spectrometry Dr Malin Bäckström Mammalian Protein Expression Core Facility P4EU meeting Porto Nov 11-12, 2013 MPE - A tissue culture facility
More informationFetuin Glycoprotein Standard
Certificate of Analysis Fetuin Glycoprotein tandard Cat. #: GCP-FET-U-X (GCP-FET-U B7K- *) Batch: BC- Nominal size: * μg Expiry Date: Apr Description: A glycoprotein standard for use during glycan release
More informationBiosynthesis of N and O Glycans
TechNote #TNGL101 Biosynthesis of N and O Glycans These suggestions and data are based on information we believe to be reliable. They are offered in good faith, but without guarantee, as conditions and
More informationIsolation of a Baculovirus Variant That Exhibits Enhanced Polyhedra Production Stability during Serial Passage in Cell Culture
JOURNAL OF INVERTEBRATE PATHOLOGY 67, 153 160 (1996) ARTICLE NO. 0023 Isolation of a Baculovirus Variant That Exhibits Enhanced Polyhedra Production Stability during Serial Passage in Cell Culture JAMES
More informationLarge-Scale Production of Porcine Mature Interleukin-18 (IL-18) in Silkworms Using a Hybrid Baculovirus Expression System
FULL PAPER Immunology Large-Scale Production of Porcine Mature Interleukin-18 (IL-18) in Silkworms Using a Hybrid Baculovirus Expression System Yoshihiro MUNETA 1), Hong Kun ZHAO 2), Shigeki INUMARU 1)
More informationBiochemistry: A Short Course
Tymoczko Berg Stryer Biochemistry: A Short Course Second Edition CHAPTER 10 Carbohydrates 2013 W. H. Freeman and Company Chapter 10 Outline Monosaccharides are aldehydes or ketones that contain two or
More informationPNGase F Instruction Manual
PNGase F Instruction Manual Catalog Number 170-6883 Bio-Rad Laboratories, 2000 Alfred Nobel Dr., Hercules, CA 94547 4006094 Rev A Table of Contents Section 1 Introduction...1 Section 2 Kit Components and
More informationSUPPLEMENTARY MATERIAL
SUPPLEMENTARY MATERIAL Purification and biochemical properties of SDS-stable low molecular weight alkaline serine protease from Citrullus Colocynthis Muhammad Bashir Khan, 1,3 Hidayatullah khan, 2 Muhammad
More informationN-Glycan Sequencing Kit
PROTEIN TOOLS N-Glycan Sequencing Kit Instruction Manual NEB #E577S 2 reactions Version 1. 1/18 be INSPIRED drive DISCOVERY stay GENUINE This product is intended for research purposes only. This product
More informationMINIREVIEW Vertical Transmission of Nucleopolyhedrovirus in Insects
Journal of Invertebrate Pathology 74, 103 111 (1999) Article ID jipa.1999.4873, available online at http://www.idealibrary.com on MINIREVIEW Vertical Transmission of Nucleopolyhedrovirus in Insects Barbara
More informationMammalian Membrane Protein Extraction Kit
Mammalian Membrane Protein Extraction Kit Catalog number: AR0155 Boster s Mammalian Membrane Protein Extraction Kit is a simple, rapid and reproducible method to prepare cellular protein fractions highly
More informationRAPID SAMPLE PREPARATION METHODS FOR THE ANALYSIS OF N-LINKED GLYCANS
RAPID SAMPLE PREPARATION METHODS FOR THE ANALYSIS OF N-LINKED GLYCANS Zoltan Szabo, András Guttman, Tomas Rejtar and Barry L. Karger Barnett Institute, Boston, MA, USA PCT Workshop,Boston, 21 May, 2010.
More informationTECHNICAL BULLETIN. Enzymatic Protein Deglycosylation Kit. Catalog Number EDEGLY Storage Temperature 2 8 C
Enzymatic Protein Deglycosylation Kit Catalog Number EDEGLY Storage Temperature 2 8 C TECHNICAL BULLETIN Product Description The EDEGLY kit contains all the enzymes and reagents needed to completely remove
More informationGlycoprotein Deglycosylation Kit Cat. No
Visit our interactive pathways at /pathways User Protocol 362280 Rev. 23 February 2006 RFH Page 1 of 5 Glycoprotein Deglycosylation Kit Cat. No. 362280 Note that this user protocol is not lot-specific
More informationBacPAK Baculovirus Rapid Titer Kit
BacPAK Baculovirus Rapid Titer Kit United States/Canada 800.662.2566 Asia Pacific +1.650.919.7300 Europe +33.(0)1.3904.6880 Japan +81.(0)77.543.6116 Cat. No. 631406 PT3153-1 (072213) Clontech Laboratories,
More informationSupporting information
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2014 Supporting information Glycan Reductive Isotope-coded Amino Acid Labeling (GRIAL) for Mass Spectrometry-based
More informationTECHNICAL BULLETIN. Sialic Acid Quantitation Kit. Catalog Number SIALICQ Storage Temperature 2 8 C
Sialic Acid Quantitation Kit Catalog Number SIALICQ Storage Temperature 2 8 C TECHNICAL BULLETIN Product Description The Sialic Acid Quantitation Kit provides a rapid and accurate determination of total
More informationSupplementary material: Materials and suppliers
Supplementary material: Materials and suppliers Electrophoresis consumables including tris-glycine, acrylamide, SDS buffer and Coomassie Brilliant Blue G-2 dye (CBB) were purchased from Ameresco (Solon,
More informationPathology and Morphogenesis of a Granulosis Virus of the Diamondback Moth
20 Pathology and Morphogenesis of a Granulosis Virus of the Diamondback Moth Tetsu Asayama Plant Protection Laboratory, Aichi-Ken Agricultural Research Center, Nagakute, Aichi 480-1 1, Japan Abstract In
More informationMonika Wilde Miriam Klausberger Dieter Palmberger Wolfgang Ernst Reingard Grabherr
Biotechnol Lett (2014) 36:743 749 DOI 10.1007/s10529-013-1429-6 ORIGINAL RESEARCH PAPER Tnao38, high five and Sf9 evaluation of host virus interactions in three different insect cell lines: baculovirus
More informationPolyhedrosis Virus. (LdNPV HA) were obtained from Edward Dougherty, U.S. Department of Agriculture Insect Pathology Laboratory,
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Aug. 1983, P. 297-303 Vol. 46, No. 2 0099-2240/83/080297-07$02.00/0 Copyright 0 1983, American Society for Microbiology Characterization of Gypsy Moth (Lymantria
More informationDr Mark Hilliard, NIBRT. Waters THE SCIENCE OF WHAT S POSSIBLE TM
RFMS Glycan Characterization Techniques for Biotherapeutics Dr Mark Hilliard, NIBRT Waters THE SCIENCE OF WHAT S POSSIBLE TM The Complexity of Glycosylation Glycosylation is the most common posttranslational
More informationEnhancing the baculovirus expression system with VANKYRIN technology. Kendra Steele, Ph.D.
Enhancing the baculovirus expression system with VANKYRIN technology Kendra Steele, Ph.D. Insect cells Can express mammalian proteins Similarities with mammalian cells Eukaryotic systems How protein are
More informationOligosaccharide Profiling of O-linked Oligosaccharides Labeled with 2 Aminobenzoic Acid (2-AA)
Oligosaccharide Profiling of O-linked Oligosaccharides Labeled with 2 Aminobenzoic Acid (2-AA) Elisabeth A. Kast and Elizabeth A. Higgins GlycoSolutions Corporation, Worcester, MA Data originally presented
More informationSupplementary figure 1 Supplementary figure 2
Supplementary figure 1 Schematic overview of the Fc-glycan of IgG. The glycan is composed of a constant core domain (highlighted in red) composed of mannose (Man) and N-acetylglucosamine (GlcNAc) residues
More informationHIV-1 Virus-like Particle Budding Assay Nathan H Vande Burgt, Luis J Cocka * and Paul Bates
HIV-1 Virus-like Particle Budding Assay Nathan H Vande Burgt, Luis J Cocka * and Paul Bates Department of Microbiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, USA
More informationOligosaccharide Analysis by High-Performance Anion- Exchange Chromatography with Pulsed Amperometric Detection
Oligosaccharide Analysis by High-Performance Anion- Exchange Chromatography with Pulsed Amperometric Detection Jeff Rohrer, Ph.D. Director, Applications Development, Dionex Products 1 The world leader
More informationKE-SIALIQ Sialic Acid Quantitation Kit. SialiQuant Sialic Acid Quantitation Kit
SialiQuant Sialic Acid Quantitation Kit Part Number KE-SIALIQ Certification of Analysis Lot Number 706.1A Kit Storage Kits should be stored at 4 C. Kit Contents Kit contains all the reagents to quickly
More informationraed a 4: A New 67-kDa Aedes aegypti Mosquito Salivary Allergen for the Diagnosis of Mosquito Allergy
Short Communication Int Arch Allergy Immunol 26;7:26 2 DOI:.59/448587 Received: March 6, 26 Accepted after revision: July 9, 26 Published online: September 8, 26 raed a 4: A New 67-kDa Aedes aegypti Mosquito
More informationBehavior of a Recombinant Baculovirus in Lepidopteran Hosts with Different Susceptibilities
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Mar. 2001, p. 1140 1146 Vol. 67, No. 3 0099-2240/01/$04.00 0 DOI: 10.1128/AEM.67.3.1140 1146.2001 Copyright 2001, American Society for Microbiology. All Rights Reserved.
More informationApplication Note. Abstract. Author. Biotherapeutics & Biosimilars. Sonja Schneider Agilent Technologies, Inc. Waldbronn, Germany
Sensitive and Reproducible Glycan Analysis of Human Immunoglobulin G The Agilent 1260 Infi nity Bio-inert Quaternary LC System with an Agilent AdvanceBio 2.7 µm Glycan Mapping Column and Fluorescence Detection
More informationPEG Virus Precipitation Kit
ab102538 PEG Virus Precipitation Kit Instructions for Use For the rapid, sensitive and accurate purification of viruses in various samples This product is for research use only and is not intended for
More informationInfluence of Larval Age on the Lethal and Sublethal Effects of the Nucleopolyhedrovirus of Trichoplusia ni in the Cabbage Looper
BIOLOGICAL CONTROL 12, 119 126 (1998) ARTICLE NO. BC980616 Influence of Larval Age on the Lethal and Sublethal Effects of the Nucleopolyhedrovirus of Trichoplusia ni in the Cabbage Looper Maynard L. Milks,
More informationMitochondrial Trifunctional Protein (TFP) Protein Quantity Microplate Assay Kit
PROTOCOL Mitochondrial Trifunctional Protein (TFP) Protein Quantity Microplate Assay Kit DESCRIPTION Mitochondrial Trifunctional Protein (TFP) Protein Quantity Microplate Assay Kit Sufficient materials
More informationEnvelope glycans of immunodeficiency virions are almost entirely oligomannose antigens
Supporting Information for: Envelope glycans of immunodeficiency virions are almost entirely oligomannose antigens Katie J. Doores *1,2, Camille Bonomelli *3, David J. Harvey 3, Snezana Vasiljevic 3, Raymond
More informationINSECTICIDE RESISTANCE MONITORING IN LEPIDOPTERAN COTTON PESTS
INSECTICIDE RESISTANCE MONITORING IN LEPIDOPTERAN COTTON PESTS Russell J. Ottens, John R. Ruberson, Robert E. Harbin, and Phillip M. Roberts Dept. of Entomology, University of Georgia, Tifton, GA Introduction
More informationOxford Expression Technologies Ltd
Oxford Expression Technologies Ltd Founded in 2007 as a spin out from Oxford Brookes University and Natural Environment Research Council Technology based on the insect baculovirus expression vectors (BEVs)
More informationProtein Trafficking in the Secretory and Endocytic Pathways
Protein Trafficking in the Secretory and Endocytic Pathways The compartmentalization of eukaryotic cells has considerable functional advantages for the cell, but requires elaborate mechanisms to ensure
More informationMidi Plant Genomic DNA Purification Kit
Midi Plant Genomic DNA Purification Kit Cat #:DP022MD/ DP022MD-50 Size:10/50 reactions Store at RT For research use only 1 Description: The Midi Plant Genomic DNA Purification Kit provides a rapid, simple
More informationThe Use of the Enzyme Linked Immunosorbent Assay to Detect a Nuclear Polyhedrosis Virus in Heliothis armigera Larvae. (Accepted 22 February 1978)
J. gen. Virol. (I978), 4o, 465-469 Printed in Great Britain 465 The Use of the Enzyme Linked Immunosorbent Assay to Detect a Nuclear Polyhedrosis Virus in Heliothis armigera Larvae (Accepted 22 February
More informationReceived: 20 th Feb-2014 Revised: 15 th March-2014 Accepted: 19 th March-2014 Research article
Received: 20 th Feb-2014 Revised: 15 th March-2014 Accepted: 19 th March-2014 Research article BIOCHEMICAL CHANGES DURING THE PROGRESSIVE INFECTION OF BmIFV IN THE SILKWORM, BOMBYX MORI L. M. Mamatha*
More informationNature Methods: doi: /nmeth Supplementary Figure 1
Supplementary Figure 1 Subtiligase-catalyzed ligations with ubiquitin thioesters and 10-mer biotinylated peptides. (a) General scheme for ligations between ubiquitin thioesters and 10-mer, biotinylated
More informationFACE N-Linked Oligosaccharide Sequencing Kit GK TOOLS FOR GLYCOBIOLOGY
FACE N-Linked Oligosaccharide Sequencing Kit GK90300 TOOLS FOR GLYCOBIOLOGY www.glyko.com FACE N-Linked Oligosaccharide Sequencing Kit (10 Reactions) Please read the following protocol right through before
More informationDetailed Characterization of Antibody Glycan Structure using the N-Glycan Sequencing Kit
be INSPIRED drive DISCOVERY stay GENUINE APPLICATION NOTE Detailed Characterization of Antibody Glycan Structure using the N-Glycan Sequencing Kit Beth McLeod, New England Biolabs, Inc. Materials Remicade
More informationThe rabbit femoral artery was prepared and each arterial ring was permeabilized
Online Supplement Nakmura et al. cgmp-dependent relaxation of smooth muscle Materials and Methods Measurement of tension The rabbit femoral artery was prepared and each arterial ring was permeabilized
More informationPurification and Fluorescent Labeling of Exosomes Asuka Nanbo 1*, Eri Kawanishi 2, Ryuji Yoshida 2 and Hironori Yoshiyama 3
Purification and Fluorescent Labeling of Exosomes Asuka Nanbo 1*, Eri Kawanishi 2, Ryuji Yoshida 2 and Hironori Yoshiyama 3 1 Graduate School of Medicine, Hokkaido University, Sapporo, Japan; 2 Graduate
More informationSciences, China Jiliang University, Hangzhou , PR China. Downloaded from by IP:
Journal of General Virology (212), 93, 248 2489 DOI 1.199/vir..43836- A baculovirus isolated from wild silkworm encompasses the host ranges of Bombyx mori nucleopolyhedrosis virus and Autographa californica
More informationRAPID COMMUNICATION JASMONATE IN LEPIDOPTERAN EGGS AND NEONATES
Journal of Chemical Ecology, Vol. 31, No. 11, November 2005 ( #2005) DOI: 10.1007/s10886-005-8553-2 RAPID COMMUNICATION JOHN F. TOOKER* and CONSUELO M. DE MORAES Department of Entomology, The Pennsylvania
More information1 Recombinant proteins in insect and mammal cells , F E B R U A R Y 2 3 RD
1 Recombinant proteins in insect and mammal cells 2 0 1 8, F E B R U A R Y 2 3 RD Bacteria Yeast Insect cells Mammalian Cell growth Medium complexity Rapid (30 min) Rapid (90 min) Slow (18-24h) Slow (24h)
More informationGlycoproteins and Mucins. B.Sopko
Glycoproteins and Mucins B.Sopko Content Glycoproteins: Structures and Linkages Interconversions and activation of dietary sugars Other pathways of sugar nucleotide metabolism Biosynthesis of oligosaccharides
More informationThe addition of sugar moiety determines the blood group
The addition of sugar moiety determines the blood group Sugars attached to glycoproteins and glycolipids on the surfaces of red blood cells determine the blood group termed A, B, and O. The A and B antigens
More informationIMPROVED SHELF LIFE OF BELL CAPSICUM FRUITS BY MANIPULATION OF THE ACTIVITIES OF GLYCOSIDASES THROUGH HEAT TREATMENT
IMPROVED SHELF LIFE OF BELL CAPSICUM FRUITS BY MANIPULATION OF THE ACTIVITIES OF GLYCOSIDASES THROUGH HEAT TREATMENT B.H. JAGADEESH, T.N. PRABHA AND K. SRINIVASAN* Department of Biochemistry and Nutrition,
More informationSupporting Information File S2
Pulli et al. Measuring Myeloperoxidase Activity in Biological Samples Page 1 of 6 Supporting Information File S2 Step-by-Step Protocol Reagents: Sucrose (Sigma, S3089) CaCl 2 (Sigma, C5770) Heparin Sodium
More informationRecombinant Protein Expression Retroviral system
Recombinant Protein Expression Retroviral system Viruses Contains genome DNA or RNA Genome encased in a protein coat or capsid. Some viruses have membrane covering protein coat enveloped virus Ø Essential
More informationNOTES. In Vivo Induction of Apoptosis Correlating with Reduced Infectivity during Baculovirus Infection. Thomas E. Clarke and Rollie J.
JOURNAL OF VIROLOGY, Feb. 2003, p. 2227 2232 Vol. 77, No. 3 0022-538X/03/$08.00 0 DOI: 10.1128/JVI.77.3.2227 2232.2003 Copyright 2003, American Society for Microbiology. All Rights Reserved. NOTES In Vivo
More informationHigh fidelity glycan sequencing using a combination of capillary electrophoresis and exoglycosidase digestion
High fidelity glycan sequencing using a combination of capillary electrophoresis and exoglycosidase digestion Andras Guttman Senior Manager Applications, Separations SCIEX, Brea, CA 92822 The rapidly increasing
More informationThe effect of temperature and incubation time on the analysis of highly sialylated glycans from bovine fetuin
APPLICATION NOTE GlycanAssure Glycan Analysis and Quantitation System The effect of temperature and incubation time on the analysis of highly sialylated glycans from bovine fetuin Abstract This application
More informationIntroduction. Methods RESEARCH FUND FOR THE CONTROL OF INFECTIOUS DISEASES. TCW Poon *, HLY Chan, HWC Leung, A Lo, RHY Lau, AY Hui, JJY Sung
RESEARCH FUND FOR THE CONTROL OF INFECTIOUS DISEASES Liver specific glycoforms of serum proteins in chronic hepatitis B infection: identification by lectin affinity chromatography and quantitative proteomic
More informationGut contents in molting lepidopteran larvae: a source of error in nutritional studies
Entomol. exp. appl. 62: 87-91, 1992. 9 1992 Kluwer Academic Publishers. Printed in Belgium. 87 Gut contents in molting lepidopteran larvae: a source of error in nutritional studies R. V. Barbehenn I &
More informationSupporting Information for:
Supporting Information for: Methylerythritol Cyclodiphosphate (MEcPP) in Deoxyxylulose Phosphate Pathway: Synthesis from an Epoxide and Mechanisms Youli Xiao, a Rodney L. Nyland II, b Caren L. Freel Meyers
More informationab Membrane Fractionation Kit Instructions for Use For the rapid and simple separation of membrane, cytosolic and nuclear cellular fractions.
ab139409 Membrane Fractionation Kit Instructions for Use For the rapid and simple separation of membrane, cytosolic and nuclear cellular fractions. This product is for research use only and is not intended
More informationPurification of Glucagon3 Interleukin-2 Fusion Protein Derived from E. coli
Purification of Glucagon3 Interleukin-2 Fusion Protein Derived from E. coli Hye Soon Won Dept. of Chem. Eng. Chungnam National University INTRODUCTION Human interleukin-2(hil-2) - known as T Cell Growth
More informationDepleting Lipoproteins from Serum
Depleting Lipoproteins from Serum Kathy K. Foxx Kalen Biomedical LLC President For decades, fetal bovine serum (FBS) has been used as a supplement for cell-culture media, providing the growth factors that
More informationEquilibrium and kinetic analysis of Autographa californica nuclear polyhedrosis virus attachment to different insect cell lines
Journal of General Virology (1992), 73, 3185-3194. Printed in Great Britain 3185 Equilibrium and kinetic analysis of Autographa californica nuclear polyhedrosis virus attachment to different insect cell
More informationLudgerPure TM APTS Labelled IgG Glycan Library
Certificate of Analysis LudgerPure TM APTS Labelled IgG Glycan Library Cat. #: CAPTS-IgG-0 Batch #. B-0 Size: approx. 0 pmol Description and: Source A mixture of APTS labelled fucosylated bi-antennary
More informationChapter 5. Viral infections (I)
Chapter 5. Viral infections (I) 1. Properties of virus - Virus: derived from Latin and means poison or stench (foul odor) - Definition an infectious, potentially pathogenic nucleoprotein entity which reproduces
More informationGlycoproteins and N-glycans from exosomes
Glycoproteins and N-glycans from exosomes Júlia Costa Laboratory of Glycobiology WP3: Exosome specific glycosignatures defining specificity in exosomes targeting GlioEx University Medical Center Hamburg
More informationChapter 11. Learning objectives: Structure and function of monosaccharides, polysaccharide, glycoproteins lectins.
Chapter 11 Learning objectives: Structure and function of monosaccharides, polysaccharide, glycoproteins lectins. Carbohydrates Fuels Structural components Coating of cells Part of extracellular matrix
More informationProject Title: Study of molecular mechanisms to preserve codling moth control agents
FINAL PROJECT REPORT Project Title: Study of molecular mechanisms to preserve codling moth control agents PI: Stephen F. Garczynski Organization: USDA-ARS YARL Telephone: 509-454-6572 Email: steve.garczynski@ars.usda.gov
More informationWhat sort of Science is Glycoscience? (Introductory lecture)
Glycosciences: Glycobiology & Glycochemistry e-learning course What sort of Science is Glycoscience? (Introductory lecture) Paula Videira Faculdade de Ciências Médicas Nova University, Lisbon Portugal
More informationSummary and conclusions
Summary and conclusions 133 Part 1: Toxicity effects of Cry toxins upon hemocoelic delivery to A. janata larvae The first investigation was aimed to find out whether other modes of delivery of Cry toxins
More informationBIOL 208: Principles of Ecology and Evolution Lab Week 5, 6, &7. Bioenergetics of Caterpillars
Background BIOL 08: Principles of Ecology and Evolution Lab Week 5,, &7 The tobacco hornworm larva (Manduca sexta) eats the leaves of a wide range of solanaceous plants (tomato, tobacco). It passes through
More informationIn vitro culture and low temperature incubation tolerance of staged embryos of the silkworm, Bombyx mori
Journal of Insect Biotechnology and Sericology 85, 49-53 (2016): Short Communication In vitro culture and low temperature incubation tolerance of staged embryos of the silkworm, Bombyx mori Hisayoshi Fukumori,
More informationIdentification of the Virucidal Agent in Wastewater Sludge
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Apr. 1977, p. 860-864 Copyright X) 1977 American Society for Microbiology Vol. 33, No. 4 Printed in U.S.A. Identification of the Virucidal Agent in Wastewater Sludge
More informationMEK1 Assay Kit 1 Catalog # Lot # 16875
MEK1 Assay Kit 1 Kit Components Assay Dilution Buffer (ADB), Catalog # 20-108. Three vials, each containing 1.0ml of assay dilution buffer (20mM MOPS, ph 7.2, 25mM ß-glycerol phosphate, 5mM EGTA, 1mM sodium
More informationWestern Blot Analysis of Rat Pituitar Recognized by Human Antipituitary. y Antigens A. antibodies
Endocrine Journal 1995, 42(1), 115-119 NOTE Western Blot Analysis of Rat Pituitar Recognized by Human Antipituitary y Antigens A ntibodies SHIGEKI YABE, MASAMI MURAKAMI*, KAYOKO MARUYAMA, HIDEKO MIWA,
More informationSupporting Information. Post translational Modifications of Serotonin Type 4 Receptor Heterologously Expressed in. Mouse Rod Cells
Supporting Information Post translational Modifications of Serotonin Type 4 Receptor Heterologously Expressed in Mouse Rod Cells David Salom,, Benlian Wang,, Zhiqian Dong, Wenyu Sun, Pius Padayatti, Steven
More informationCommunication. Identification of Methionine N -Acetyltransferase from Saccharomyces cerevisiae
Communication THE JOURNAL OP BIOLOGICAL CHEMISTRY Vol. 265, No. 7, Issue of March 5, pp. 3603-3606,lSSO 0 1990 by The American Society for Biochemistry and Molecular Biology, Inc. Printed in U. S. A. Identification
More informationEnzymatic Assay of PHOSPHOLIPASE C (EC ) from Bacillus cereus
PRINCIPLE: Lecithin + H 2 O Phospholipase C > Diglyceride + Choline Phosphate Choline Phosphate + H 2 O Alkaline Phosphatase > Choline + P i Choline + O 2 Choline Oxidase > Betaine Aldehyde + H 2 O 2 Betaine
More informationTivadar Orban, Beata Jastrzebska, Sayan Gupta, Benlian Wang, Masaru Miyagi, Mark R. Chance, and Krzysztof Palczewski
Structure, Volume Supplemental Information Conformational Dynamics of Activation for the Pentameric Complex of Dimeric G Protein-Coupled Receptor and Heterotrimeric G Protein Tivadar Orban, Beata Jastrzebska,
More informationWestern Immunoblotting Preparation of Samples:
Western Immunoblotting Preparation of Samples: Total Protein Extraction from Culture Cells: Take off the medium Wash culture with 1 x PBS 1 ml hot Cell-lysis Solution into T75 flask Scrap out the cells
More informationTransfection of Sf9 cells with recombinant Bacmid DNA
Transposition Bacmid DNA Mini Culturing baculo cells Transfection of Sf9 cells with recombinant Bacmid DNA Amplification of the virus Titration of baculo stocks Testing the expression Transposition 1.
More informationBaculovirus vector-mediated expression of heterologous genes in insect cells
J. Biosci., Vol. 19, Number 5, December 1994, pp 603 614. Printed in India. Baculovirus vector-mediated expression of heterologous genes in insect cells P SRIDHAR, Α Κ AWASTHI, C A AZIM, S BURMA, S HABIB,
More informationRalf Wagner Paul-Ehrlich-Institut
www.pei.de Other Assays for the Detection of Neuraminidase (NA)-Specific Antibodies Ralf Wagner Paul-Ehrlich-Institut Overview to presented assays Assay principle based on: Chemical substrates: Protein
More informationab CytoPainter Golgi/ER Staining Kit
ab139485 CytoPainter Golgi/ER Staining Kit Instructions for Use Designed to detect Golgi bodies and endoplasmic reticulum by microscopy This product is for research use only and is not intended for diagnostic
More information