Coagulation factor VII is a vitamin K-dependent factor which is essential for hemostasis. It circulates in the blood as a zymogen which is later converted to an active form by factor IXa， factor Xa， factor XIIa， or thrombin by minor proteolysis. Upon activation of factor VII， a heavy chain with a catalytic domain and a light chain with 2 EGF-like domains are generated， and the two chains are held together by a disulfide bond. The presence of factor III and calcium ions further activates the coagulation cascade by converting factor IX to factor IXa and/or factor X to factor Xa. Alternative splicing of factor VII results in 2 transcripts. Defects in coagulation factor VII can cause coagulopathy. Coagulation factor VII initiates the extrinsic pathway of blood coagulation. Minor proteolysis converts factor VII to factor VIIa by factors Xa， XIIa， IXa， or thrombin. Factor VIIa also converts factor IX to factor IXa in the presence of tissue factor and calcium.
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來源宿主
幼年倉鼠腎細胞BHK細胞中重組表達
溶解建議
Sterile Filtered White lyophilized （freeze-dried） powder. The protein 1 mg/ml was lyophilized after from a sterile solution containing 4.86 mg sodium chloride， 2.45 mg calcium chloride dihydrate， 50 mg mannitol and 116 ug Tween 80. It is recommended to reconstitute the lyophilized Factor-VIIa in sterile 18MΩ-cm H2O not less than 100ug/ml， which can then be further diluted to other aqueous solutions.
保存建議
Lyophilized Factor-VIIa although stable at room temperature for 3 weeks， should be stored desiccated below -18℃. Upon reconstitution Factor-VIIa should be stored at 4℃ between 2-7 days and for future use below -18℃.
Please prevent freeze-thaw cycles.
