ID 2.7.11.19 DE phosphorylase kinase. AN dephosphophosphorylase kinase. AN glycogen phosphorylase kinase. AN PHK. AN phosphorylase b kinase. AN phosphorylase B kinase. AN phosphorylase kinase (phosphorylating). CA 2 ATP + phosphorylase b = 2 ADP + phosphorylase a. CC -!- Requires calmodulin for activity. CC -!- The enzyme phosphorylates a specific serine residue in each of the CC subunits of the dimeric phosphorylase b. CC -!- For muscle phosphorylase but not liver phosphorylase, this is CC accompanied by a further dimerization to form a tetrameric CC phosphorylase. CC -!- The enzyme couples muscle contraction with energy production via CC glycogenolysis--glycolysis by catalyzing the Ca(2+)-dependent CC phosphorylation and activation of glycogen phosphorylase b. CC -!- The gamma subunit of the tetrameric alphabetagammadelta enzyme is the CC catalytic subunit. CC -!- Formerly EC 2.7.1.38. DR Q16816, PHKG1_HUMAN; P07934, PHKG1_MOUSE; P00518, PHKG1_RABIT; DR P13286, PHKG1_RAT ; Q2KJ16, PHKG2_BOVIN; P15735, PHKG2_HUMAN; DR Q9DB30, PHKG2_MOUSE; P31325, PHKG2_RAT ; //