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Title: The in vitro phosphorylation of actin from rat cerebral cortex. Author: Dunkley PR, Robinson PJ. Journal: Neurochem Res; 1983 Jul; 8(7):865-71. PubMed ID: 6312348. Abstract: Actin was phosphorylated by a cyclic AMP-stimulated protein kinase in a lysed synaptosomal fraction incubated with [gamma-32P]ATP, while calcium had no effect on endogenous labeling of the protein. Incubation of an intact synaptosomal fraction with 32P-inorganic phosphate did not lead to any detectable phosphorylation of actin in the presence or absence of dibutyryl-cyclic AMP, or chemical depolarization. It is suggested that actin is not phosphorylated in the physiologically relevant intact synaptosomes but gains access to protein kinases on lysis.[Abstract] [Full Text] [Related] [New Search]