D-Allocystathionine

D-Allocystathionine is a natural organic compound that contains a sulfur atom and two thiol groups. It is an intermediate in the synthesis of cysteine from methionine. D-Allocystathionine is also an inhibitor of fibrinogen, which can be used as a therapeutic agent for the treatment of cardiovascular disease. D-Allocystathionine binds to the active site of enzymes that contain disulfide bonds, such as phaeochromogenes and lysosomal enzymes. This binding prevents the oxidation of sulfhydryl groups to form disulfides, thereby inhibiting their activity.