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Enzyme Research 是一家拥有超过25年的酶研究的实验室，生产和开发多种用于基本凝血研究的多种酶和辅因子。在过去的十年Enzyme Research Laboratories为科学家参与止血和血栓形成的研究提供了宝贵支持。Enzyme Research通过不断追求产品的zui高品质，赢得了世界各地凝血研究实验室的信任。
Enzyme Research Laboratories为生物技术公司,制药行业、医院和大学的研究实验室提供用于的纯化抗凝因子。除了其制造能力，Enzyme Research Laboratories也创新研发领域中的血液凝固技术。

Human Factor XII

HFXII 1212         Human Factor XII （Hageman Factor）

Purified from fresh frozen human plasma. Human Factor XII is part of the contact activation system. Human Factor XII is a single chain glycoprotein with a molecular weight of about 80,000. Once activated, principally from the action of kallikrein, Factor XII is converted into an active serine protease （Factor α-Xlla） that functions in the in vivo initiation of blood coagulation, fibrinolysis, and kinin formation. Human Factor XII has been purified by ion exchange chromatography. Protein purity is determined by SDS-PAGE and activity is determined via clotting assay.

Buffer composition = 4 mM Sodium Acetate-HCl/0.15 M NaCl/pH 5.3 
*Extinction Coefficient （1%） =14.1
Molecular Weight = 80,000 daltons