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当前位置: 首页 > 产品中心 > Sandwich_method_ELISA > Hycult生物技术公司/凝血因子XII,人,ELISA试剂盒| Hycult生物技术公司/HK373-02
商品详细Hycult生物技术公司/凝血因子XII,人,ELISA试剂盒| Hycult生物技术公司/HK373-02
Hycult生物技术公司/凝血因子XII,人,ELISA试剂盒| Hycult生物技术公司/HK373-02
Hycult生物技术公司/凝血因子XII,人,ELISA试剂盒| Hycult生物技术公司/HK373-02
商品编号: HK373-02
品牌: hycultbiotech
市场价: ¥18800.00
美元价: 11280.00
产地: 美国(厂家直采)
公司:
产品分类: 夹心法ELISA
公司分类: Sandwich_method_ELISA
联系Q Q: 3392242852
电话号码: 4000-520-616
电子邮箱: info@ebiomall.com
商品介绍
FXII is a serine protease and plays a role in blood coagulation, fibrinolysis, kinin and complement systems. The protein is the zymogen of the serine protease factor XIIa (FXIIa). FXII is converted to FXIIa through autoactivation induced by contact to charged surfaces, also known as the plasma contact system. FXII is predominantly synthesized in the liver and is composed of fibronectin type I and II domains, two epidermal growth factor-like domains, a kringle region, a proline-rich domain and a catalytic domain. Its molecular weight is approximately 80kDa on SDS-PAGE gel electroforeses. The protein circulates in the plasma at a concentration of 30-35 μg/ml.FXII forms the plasma contact system together with high molecular weight kininogen and plasma kallikrein. FXII autoactivates when these three proteins form a complex on negatively charged nonphysiological surfaces, like inorganic surfaces (eg silicon tubes) or macromolecular organic surfaces (eg heparin) bound to the surface of different cell types, including endothelial cells, platelets and neutrophils. It can trigger blood coagulation and generation of proinflammatory bradykinin. After surface complexation, FXII autoactivates into FXIIa, also called factor XII fragment(XIIf). Once small amounts of kallikrein are formed a positive feedback loop is active leading to enhanced conversion into FXIIa. The activation leads to a series of active enzyme formation. FXIIa converts prekallikrein to kallikrein and kallikrein digests kinogen to liberate proinflammatory bradykinin. Bradykinin triggers inflammatory reactions via activating endothelial cells resulting in vasodilatation, increased vascular permeability and production of other mediators like nitric oxide.The contact system has the ability to activate the complement system via the classical pathway. Simultaneous activation of both systems may lead to pathological conditions, like hereditary angioedema in individuals with dysfunctional C1-inhibitor (C1-IHB). FXIIa can activate complement protein C1r and to a lesser degree C1s in absence of C1-IHB. This leads to unimpeded bradykinin formation resulting in angioedema. Other interactions with complement system are found on the level of gC1qR and MASP-1.
品牌介绍
荷兰HyCult Biotechnology(HBT)位于荷兰乌登,从1994开始制造检测抗体和蛋白质,主要侧重与病理学诊断有关的全套产品研发,既有纯化的重组蛋白和多肽,也有单抗和多抗,是世界一流的先天免疫领域的研究试剂制造商。