Differential phosphorylation of MAP-2 stimulated by calcium-calmodulin and cyclic AMP

Comparison of cyclic AMP- and calcium-dependent phosphorylation in rat brain cytosol reveals MAP-2 to be a common endogenous substrate. Examination of limited protease digestion patterns indicates that the two kinases phosphorylate MAP-2 at distinct sites and suggests that such phosphorylation may have differential effects on MAP-2 function.