《英文msh词典》Phosphorylase ab
[入口词] Phosphorylase ab
[主题词] Glycogen Phosphorylase
[英文释义] An enzyme that catalyzes the degradation of GLYCOGEN in animals by releasing glucose-1-phosphate from the terminal alpha-1,4-glycosidic bond. This enzyme exists in two forms: an active phosphorylated form ( PHOSPHORYLASE A) and an inactive un-phosphorylated form (PHOSPHORYLASE B). Both a and b forms of phosphorylase exist as homodimers. In mammals,the major isozymes of glycogen phosphorylase are found in muscle,liver and brain tissue.