Phosphorylase kinase(Cat No.:I041041)is a crucial enzyme involved in the regulation of glycogen metabolism. It activates glycogen phosphorylase by phosphorylating it, which in turn catalyzes the breakdown of glycogen into glucose-1-phosphate, providing energy to cells, especially in muscles and the liver. Phosphorylase kinase itself is regulated by various factors, including phosphorylation by protein kinases such as PKA (protein kinase A) and Ca²⁺-dependent signaling in muscle cells. This enzyme plays a key role in maintaining blood glucose levels and facilitating energy production during exercise or stress, making it essential in metabolic control.