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affinity biologicals/Protein S Polyclonal Antibody - Sheep/SAPS-IG

  • 产品编号: SAPS-IG
  • 美  元  价: 待定
  • 市  场  价: ¥0.00
  • 品       牌:
  • 产       地: 美国(厂家直采)
  • 公       司: affinitybiologicals
  • 产品分类:
  • 公司分类: Product Family
affinity biologicals/Protein S Polyclonal Antibody - Sheep/SAPS-IG
  • affinity biologicals/Protein S Polyclonal Antibody - Sheep/SAPS-IG
商品介绍

Description

Protein S Polyclonal Antibody – Sheep

Affinity’s Protein S Polyclonal Antibody – Sheep is the base level of our Protein S antibody family.  The purity of IgG is typically 90% and is provided in a solution of HEPES buffered saline containing 50% glycerol (v/v).  The titre is essentially the same as the starting antiserum and each vial typically contains the amount of IgG recovered from one milliliter of antiserum.  This Protein S Polyclonal Antibody – Sheep is generally intended for use in applications such as immuno-precipitation, immuno-electrophoresis, immuno-depletion and activity neutralization assays.


Product Code: SAPS-IG

Retail Product Size: 10mg vial

Host Animal: Sheep Anti-Human Protein S Polyclonal Antibody – Sheep

Species Cross Reactivity: View Chart

Product Datasheet: Protein S PS Polyclonal Antibody, purified anti-human sheep IgG


Description of Protein S

Protein S is a vitamin K-dependent glycoprotein produced in the liver, endothelium and megakaryocytes. The concentration of PS in plasma is ~25 μg/ml (~325 nM) where it acts as a cofactor in the anticoagulant activity of activated Protein C. A deficiency of Protein S (quantitative or qualitative) is a risk factor for vascular thrombosis. Protein S is expressed as a single chain molecule with a molecular weight of 77 kDa. The structure of PS is similar to many other vitamin-K dependent coagulation proteins, consisting of an N-terminal calcium binding domain of 10 γ-carboxyglutamic acid (gla) residues, followed by a thrombin-sensitive loop region and 4 EGF-like domains. The C-terminal domain does not contain the usual catalytic triad of a proenzyme, but seems instead to be involved in the binding of PS to C4b-binding protein (C4bp). Protein S binds to activated Protein C (APC) in the presence of calcium and negatively charged phospholipid surface to allow APC to proteolytically inactivate coagulation cofactors Va and VIIIa. Enzymatic regulation of PS cofactor activity is through cleavage of PS in the thrombin-sensitive loop region by thrombin or other enzymes, resulting in the loss of calcium binding properties and APC cofactor activity. Another regulatory mechanism is to reduce the availability of PS by the binding of PS to C4bp. In plasma, approximately 60% of Protein S circulates in non-covalent complex with C4bp, making it unavailable for APC cofactor activity. The binding of PS to C4bp may be important in localizing C4bp to damaged cell membranes where it may control activation of complement by the classical pathway1-3.

References and Review

  1. Broze GJ, Miletich JP; Biochemistry and Physiology of Protein C, Protein S and Thrombomodulin; in Hemostasis and Thrombosis, 3rd Edition, eds. RW Colman, J Hirsh, VJ Marder and EW Salzman, pp 259-276, J.B. Lippincott Co., Philadelphia PA, USA, 1994.
  2. Comp PC, Doray D, Patton D, Esmon CT; An Abnormal Plasma Distribution of Protein S Occurs in Functional Protein S Deficiency. Blood 67, pp 504-508, 1986.
  3. Schwalbe RA, Dahlback B, Nelsestuen GL; Independent Association of Serum Amyloid P Component, Protein S and Complement C4b with C4b-binding Protein and Subsequent Association of the Complex with Membranes; JBC 265, pp 21749-21757, 1990.
品牌介绍

Affinity Biologicals,Inc.是全球范围内用于血栓形成和止血研究与诊断的产品的主要制造商。我们的产品包括广泛的抗体,结合物,用于人类和动物分析物免疫测定的抗体对,完整的ELISA试剂盒的VisuLize系列以及包括VisuDep免疫缺陷因子缺乏血浆,VisuCal校准血浆的全系列人类血浆产品和VisuCon控制血浆。服务包括蛋白质纯化,抗体生产,测定开发,定制制造(包括定制冻干和能力验证材料)。

Affinity Biologics生产针对凝血,止血和纤维蛋白溶解相关蛋白的全系列多克隆抗体。我们的多克隆抗体家族有多种形式。完整或纯化的IgG,亲和纯化的IgG,辣根过氧化物酶偶联,异硫氰酸荧光素(FITC)偶联和生物素偶联。所有与凝血,止血和纤维蛋白溶解相关蛋白以及缺乏因子的血浆产品有关的Affinity Biologicals多克隆抗体均在内部采购,并根据ISO13485医疗设备质量保证标准生产。

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