Solubilization of Native Actin Monomers from Human Erythrocyte Membranes

Abstract
Up to 50% of the actin in erythrocyte membranes can be solubilized at low ionic strength in a form capable of inhibiting DNAse I, in the presence of 0.4 mM and ATP and 0.05 mM calcium. In the absence of calcium and ATP, actin is released but is apparently rapidly denatured. Solubilization of G-actin increases with temperature up to 37.degree. C. At higher temperatures, actin is released rapidly but quickly loses it''s ability to inhibit DNAse I.