2.7.11.11 ATP + a protein - 2.7.11.11 ATP + a protein regulation by reversible phosphorylation, overview 2.7.11.11 ATP + a protein regulation of the enzyme involves reversible phosphorylation at the activation loop, and associative or dissociative mechanisms 2.7.11.11 ATP + a protein the enzyme is a key player in cellular responses to the second messenger cAMP 2.7.11.11 ATP + A-kinase anchor protein phosphorylation at Ser1928 2.7.11.11 ATP + actin low activity 2.7.11.11 ATP + actin sperm protein substrate 2.7.11.11 ATP + adenylate kinase 1 sperm protein substrate 2.7.11.11 ATP + adenylate kinase 5 sperm protein substrate 2.7.11.11 ATP + AID protein -