Activation of Prekallikrein with Factor α-XIIa produces the enzymatically active Kallikrein. Kallikrein is a serine protease which consists of a heavy chain (Mr 52kD) and light chains (Mr either 36 or 33 kD) linked by disulfide bridges. Kallikrein possesses enzymatic activity toward Factor XII, HK, Plasminogen, Factors XI, IX, and VII, prorenin and the complement system. After activation, the activating enzyme Factor XIIa is removed by affinity chromatography. Human Kallikrein purity is determined by SDS-PAGE and shows complete reduction upon incubation with 2-mercaptoethanol.
Extinction Coefficient (1%) = 11.7
The above protein was purified from Human plasma units that test negative for antibodies to HBc, HCV, HIV 1/2, HTLV-I/II, and non reactive for HBsAg, HIV-1 RNA, HCV RNA, HBV DNA and Syphilis by FDA approved tests. Donors are screened for CJD.
Participates in the surface-dependent activation of blood coagulation. Activates, in a reciprocal reaction, coagulation factor XII/F12 after binding to negatively charged surfaces. Releases bradykinin from HMW kininogen and may also play a role in the renin-angiotensin system by converting prorenin into renin. Catalytic activity: Cleaves selectively Arg-|-Xaa and Lys-|-Xaa bonds, including Lys-|-Arg and Arg-|-Ser bonds in (human) kininogen to release bradykinin. Activity regulation: Inhibited by SERPINA5.
生物活性
见COA
种属
人(Human)
来源
天然
预测分子量
~86 kDa
CAS编号和信息
410538-33-9
酶学委员会编号
EC 3.4.21.34
分子类型
酶
产品线
生物产品
储存与运输
物理形态
冻干(Lyophilized)
储存缓冲液
Lyophilized from 4 mM Sodium Acetate-HCl, 0.15 M NaCl, pH 5.3.
浓度
来源于人血浆; 冻干前浓度:见COA
复溶
We suggest hydrating the protein with a good quality water to the original volume (See COA). After hydration aliquot into a useful (one time use) size and freeze at -80℃.