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R&D Systems/Human Fetuin A/AHSG Antibody/AF1184/100 ug

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AF1184-100ug

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Species ReactivityHumanSpecificityDetects human Fetuin A in direct ELISAs and Western blots. In direct ELISAs, less than 5% cross-reactivity with recombinant mouse Fetuin A and recombinant rat Fetuin A is observed.SourcePolyclonal Goat IgGPurificationAntigen Affinity-purifiedImmunogenMouse myeloma cell line NS0-derived recombinant human Fetuin A/AHSGFormulationLyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.LabelUnconjugated Western Blot0.1 µg/mLSee belowImmunohistochemistry5-15 µg/mLSee belowReconstitutionReconstitute at 0.2 mg/mL in sterile PBS.ShippingThe product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °CStability & StorageUse a manual defrost freezer and avoid repeated freeze-thaw cycles. 12 months from date of receipt, -20 to -70 °C as supplied.1 month, 2 to 8 °C under sterile conditions after reconstitution.6 months, -20 to -70 °C under sterile conditions after reconstitution. References:Kellemann, J. et al. (1989) J. Biol. Chem. 264:14121.Dziegielewska, K.M. et al. (1990) J. Biol. Chem. 265:4354.Dziegielewska, K.M. et al. (1996) Histochem. Cell Biol. 106:319.Gejyo, F. and K. Schmid (1981) Biochim. Biophys. Acta. 671:78. Wang, H. et al. (1998) Proc. Natl. Acad. Sci. USA 95:14429.Mathews, S.T. et al. (2000) Mol. Cell Endocrinol. 164:87.Schäfer, C. et al. (2003) J. Clin. Invest. 112:357.Long Name:alpha-2-HS GlycoproteinEntrez Gene IDs:197 (Human); 11625 (Mouse); 25373 (Rat)Alternate Names:A2HS; AHS; AHSG; alpha-2-HS-glycoprotein; alpha-2-Z-globulin; Ba-alpha-2-glycoprotein; FETUAba-alpha-2-glycoprotein; Fetuin A; fetuin-A; HSGABackground:Human Fetuin A, also known asalpha 2-Heremans-Schmid glycoprotein, is encoded by the AHSG gene. It is a major plasma protein and a member of the cystatin superfamily of protease inhibitors (1, 2). It is expressed by hepatocytes, the principal cell source, and by monocyte/macrophages (3). The major form of plasma Fetuin A corresponds to a disulfide bond-linked two chains derived from the single chain (4). Human Fetuin A has a number of functions. It is a negative acute-phase protein with normal circulating levels in adults (300-600 μg/mL), which fall significantly (30-50%) during injury and infection (5). It enhances entry of cationic inhibitors into macrophages (6). It inhibits both insulin receptor autophosphorylation and undesirable calcification (6, 7). The purified rhFetuin A corresponds to the single chain, which can be converted to the two-chain form by rhFurin (R&D Systems, Catalog # 1503-SE) in vitro. However, the conversion does not enhance its inhibitory activity against rhCathpesin V, a cysteine protease.

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。