Title : Mechanism of action of vitamin K: evidence for the conversion of a precursor protein to prothrombin in the rat.

Pub. Date : 1971 Jul

PMID : 5283959






5 Functional Relationships(s)
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1 Previous studies have shown that the vitamin K-induced synthesis of prothrombin in a vitamin K-deficient rat is only slightly inhibited by cycloheximide treatment. Cycloheximide coagulation factor II Rattus norvegicus
2 When cycloheximide (5 mg/kg) was given to vitamin K-deficient rats 30 min before vitamin K, about 70% of the amount of prothrombin seen in rats not treated with cycloheximide was produced (two-stage assay), and the prothrombin band could be seen on the electrophoretic gels. Cycloheximide coagulation factor II Rattus norvegicus
3 When cycloheximide (5 mg/kg) was given to vitamin K-deficient rats 30 min before vitamin K, about 70% of the amount of prothrombin seen in rats not treated with cycloheximide was produced (two-stage assay), and the prothrombin band could be seen on the electrophoretic gels. Cycloheximide coagulation factor II Rattus norvegicus
4 However, if radioactive amino acids are administered to the rats after cycloheximide treatment, the newly formed prothrombin contains no radioactivity. Cycloheximide coagulation factor II Rattus norvegicus
5 The isolated prothrombin does contain radioactivity if the vitamin K-deficient rats are treated with vitamin K but no cycloheximide. Cycloheximide coagulation factor II Rattus norvegicus