Phospholipid independent phosphorylation of protamine by protein kinase C: effects of polyanions.


The ability of purified protein kinase C (PKC) to phosphorylate protamine sulphate was found to be totally independent of phospholipid cofactors, whereas the phosphorylation of protamine free base was markedly increased by the presence of phosphatidylserine (PS). The hypothesis of an activation of PKC by the sulphate groups of protamine sulphate was… (More)


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