we previously showed that rat pancreatic islet cytosol contains protein kinases that can catalyze a calcium-activated phosphorylation of an endogenous peptide that has properties , such as subunit molecular weight and isoelectric ph , that are identical to those of the m2 and m1 isoenzymes of pyruvate kinase , and that islet cytosol can catalyze phosphorylation of muscle pyruvate kinase .
C0033640
protein kinases
C0031715
phosphorylation