Standards; Amino Acids; Enzyme Activators and Inhibitors; Pharmaceutical/API Drug Impurities/Metabolites;
应用
Aminopterin (Methotrexate EP Impurity B) is a folic acid antagonist. Its actively transported into cells by thefolate transporter. In the cell, its converted to a high molecular weight polyglutamate metabolite by folylpolyglutamate synthase, that, in turn, binds to dihydrofolate reductase and inhibits its activity.
参考文献
Matherly, L.H., et al.: Cancer Res., 45, 1073 (1985), Rumberger, B.G., et al.: Cancer Res., 50, 4639 (1990), Roy, K., et al.: J. Biol. Chem., 273, 2526 (1998),