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English name: Thrombin from bovine plasma; Factor IIa
Other names: prothrombin; blood coagulation factor 3; prokinase; coagulation factor
CAS number: 9002-04-4
Molecular weight: 335800
Level: BR
Source: Bovine plasma vitality: 40 ～ 300 NIH units / mg protein
Protein: 40 ～ 60%
Properties: white or off-white amorphous powder or solid. Soluble in water, insoluble in organic solvents. The dry powder is very stable at 2 ～ 8 ℃, and the validity period is 3a; the aqueous solution is inactivated within 8h at room temperature. In the event of heat, dilute acids, alkalis, metals, and other vitality decrease. Prothrombin prepared from animal plasma is separated and activated with thromboplastin and calcium chloride. It is a proteolytic enzyme. The soluble fibrinogen in plasma is transformed into an insoluble fibrin network structure by the activation of thrombin, causing the blood to coagulate. The original fibrin consists of six peptide chains. The composition of thrombin is to cut a specific peptide bond (—Arg-Gly) from the N-terminus of four peptide chains, releasing two A peptides (19 peptides) and two B peptides (21 Peptide), the other two peptide chains with N-terminal tyrosine unchanged. After excision of A peptide and B peptide, the negative charge of protein molecules is reduced, and the linear and lateral polymerization of fibrin molecules is promoted, thereby forming a fibrin with a network structure. Use: Biochemical research. An enzyme that promotes the conversion of fibrinogen to fibrin.
Storage: -20 ℃, shelf life 6 years
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