Multiple phosphorylation of rat-liver glycogen synthase by protein kinases.


The phosphorylation sites in liver synthase were studied using gel filtration and high performance liquid chromatography of 32P-labeled tryptic peptides. Phosphorylase b kinase, calmodulin-dependent glycogen synthase kinase and glycogen synthase kinase 4 from liver phosphorylated the same low Mr tryptic peptide. cAMP-dependent protein kinase mainly… (More)


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