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R&D Systems/Recombinant Human/Mouse/Rat Activin A GMP Protein, CF/338-GMP-050/50 ug
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Purity>97%, by SDS-PAGE with silver staining.Endotoxin LevelActivityMeasured by its ability to induce hemoglobin expression in K562 human chronic myelogenous leukemia cells. Schwall, R.H. et al. (1991) Method Enzymol. 198:340. The ED50 for this effect is 0.2-1.2 ng/mL.The specific activity of Recombinant Human/Mouse/Rat Activin A is approximately 1 IU/μg, which is calibrated against human Activin A WHO International Standard (NIBSC code: 91/626).SourceChinese Hamster Ovary cell line, CHO-derived Gly311-Ser426 Manufactured and tested under cGMP guidelines.Accession #P08476 N-terminal Sequence AnalysisGly311-Leu-Glu-(Cys)-Asp-Gly-Lys-Val-Asn-IleStructure / FormDisulfide-linked homodimerPredicted Molecular Mass13 kDa (monomer)SDS-PAGE14 kDa, reducing conditions24 kDa, non-reducing conditions References:Kumanov, P. et al. (2005) Reprod. Biomed. Online 10:786.Maeshima, A. et al. (2008) Endocr. J. 55:1.Rodgarkia-Dara, C. et al. (2006) Mutat. Res. 613:123.Werner, S. and C. Alzheimer (2006) Cytokine Growth Factor Rev. 17:157.Xu, P. and A.K. Hall (2006) Dev. Biol. 299:303.Shav-Tal, Y. and D. Zipori (2002) Stem Cells 20:493.Chen, Y.G. et al. (2006) Exp. Biol. Med. 231:534.Gray, A.M. and A.J. Mason (1990) Science 247:1328.Mason, A.J. et al. (1996) Mol. Endocrinol. 10:1055.Thompson, T.B. et al. (2004) Mol. Cell. Endocrinol. 225:9.Harrison, C.A. et al. (2005) Trends Endocrinol. Metab. 16:73.Onichtchouk, D. et al. (1999) Nature 401:480.Gray, P.C. et al. (2002) Mol. Cell. Endocrinol. 188:254.Kelber, J.A. et al. (2008) J. Biol. Chem. 283:4490.Phillips, D.J. et al. (1997) J. Endocrinol. 155:65.Schneyer, A. et al. (2003) Endocrinology 144:1671.Entrez Gene IDs:3624 (Human); 16323 (Mouse)Alternate Names:Activin A; INHBABackground:Activin FamilyActivinsAirway Inflammation and RemodelingEarly Mesodermal Lineage MarkersGTPases and Regulators in Endothelial CellsMacrophage Activation MarkersNeural Progenitor Cell MarkersRed Blood Cells (RBCs)TGF-beta Superfamily
R&D Systems位于美国的明尼苏达州,一直致力于生物制品的开发与生产。公司成立之初主要生产用于医院及临床应用的血控品。1997年,公司推出第一个产品--富血小板血浆质控品;1981年,公司成为全球第二家生产含血小板全血控品的供应商。40多年的发展中,R&D Systems仍持续开发各种血控品产品。
1985年,作为公司推出的第一个科研试剂产品,也是全球第一家将该产品进行商业化生产的产品,R&D Systems成功上市了TGF-beta1蛋白。作为胞外信号分子,TGF-beta1蛋白在多种细胞中进行表达,并作为胞外信号分子参与免疫功能,细胞增殖和细胞分化等生物学过程。该产品推出后,公司陆续从生物材料中纯化了几种细胞因子产品并推向市场。
天然蛋白类产品的成功推广,加速了R&D Systems在细胞因子市场的开拓。公司于1985年形成Growth Factor事业部(现Biotechnology事业部)。Biotechnology事业部的目标是生产和营销重组人细胞因子。与天然来源提取蛋白相比较,DNA重组技术生产的蛋白产品其成本更低,产量更高,完全摆脱原料的限制。1989年,Biotechnology事业部开始开发抗细胞因子的单克隆和多克隆抗体,并于1990年开发了第一个ELISA试剂盒。
2014年2月10日,R&D Systems的母公司宣布命名为Bio-Techne. Bio-Techne旗下包括R&D Systems, Novus Biologicals, BiosPacific, Tocris Bioscience, Boston Biochem和Bionostics。
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