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主营:血浆蛋白
℡ 4000-520-616
℡ 4000-520-616
Haematologic Technologies/Human Prothrombin - Bovine Prothrombin - Mouse Prothrombin - Haematologic Technologies/HCP1-0010/HCP1-0010-1 mg
产品编号:HCP1-0010-1mg
市  场 价:¥8820.00
场      地:美国(厂家直采)
联系QQ:1570468124
电话号码:4000-520-616
邮      箱: info@ebiomall.com
美  元  价:$441.00
品      牌: haemtech
公      司:Haematologic Technologies Inc.
公司分类:
Haematologic Technologies/Human Prothrombin - Bovine Prothrombin - Mouse Prothrombin - Haematologic Technologies/HCP1-0010/HCP1-0010-1 mg
商品介绍

Prothrombin is a vitamin K-dependent plasma protein which is synthesized in the liver (1). Prior to secretion into plasma, prothrombin undergoes post-translational modification by a vitamin K-dependent carboxylase which converts ten specific glutamic acid residues to γ-carboxyglutamic acid (gla). The ten gla residues are located within the first 40 amino acids of the mature protein and contribute to the ability of prothrombin to bind to negatively charged phospholipid membranes. Prothrombin contains two regions of internal homology which are referred to as "kringle" structures. These regions of conspicuous secondary structure are located between residues 40 and 270 of the mature plasma protein and replace the growth factor domains found in several other plasma serine proteases. Thus far, no function has been ascribed to these regions, but there is suspicion that they may play a role in one of several binary protein interactions involving prothrombin. The mature single chain protein circulates in plasma as a zymogen and, during coagulation, is proteolytically activated to the potent serine protease α-thrombin. This proteolysis is catalyzed by the prothrombinase enzyme complex. During activation, prothrombin is cleaved at Arg271-Thr272 (human) / Arg273-Thr274 (bovine) and at Arg320-Ser321 (human) / Arg323-Ser324 (bovine) to a "pro" fragment (fragment 1.2) and thrombin, the latter of which is composed of two chains covalently linked by a disulfide bond. In the case of human prothrombin/thrombin, there is an additional thrombin feed-back cleavage at Arg284-Thr285 resulting in an additional 13 amino acids being removed from the mature thrombin “A” chain.

Human prothrombin is prepared from fresh frozen human plasma as described by Bajaj and coworkers (2). Bovine prothrombin is prepared from fresh bovine plasma using a modification of the procedure described by Owen and coworkers (3). Purified prothrombin is supplied in 50% (vol/vol) glycerol/H2O and should be stored at -20oC. Purity is determined by SDS-PAGE analysis, and activity is measured by clotting and/or chromogenic substrate assay, following conversion of prothrombin to thrombin.

品牌介绍

Haemtech生物制药服务(HBS)是一家领先的,符合cGMP要求的QC测试实验室,专门为生产重组和血浆衍生蛋白疗法的生物制药制造商提供分析服务,重点是那些会影响止血系统的药物。HBS使客户能够满足法规和质量测试要求,从而将其候选药物从开发转向商业化。

对生物制药的需求正在增长,并且该行业正在迅速采用外包策略,以作为满足不断升级的监管要求的一种方式。凭借在止血方面的丰富经验,HBS能够很好地协助开发影响凝血系统的药物产品。


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