title: Effects of calmodulin on the phosphoenzyme of the Ca2+-ATPase of human red cell membranes.
abstract: Comparison of the effects of calmodulin on the Ca2+-ATPase activity and on the steady-state level of the phosphoenzyme, indicates that activation of the Ca2+-ATPase is mainly due to an increase in the turnover of the phosphoenzyme and does not require occupation of the regulatory site of the Ca2+-ATPase by ATP.
mesh_terms: D002135:Calcium-Binding Proteins / Q000494:pharmacology*; D000252:Calcium-Transporting ATPases / Q000097:blood*; D002147:Calmodulin / Q000494:pharmacology*; D004910:Erythrocyte Membrane / Q000201:enzymology*; D004912:Erythrocytes / Q000201:enzymology*; D006801:Humans; D007700:Kinetics; D010750:Phosphoproteins / Q000097:blood*
chemical_list: D002135:Calcium-Binding Proteins; D002147:Calmodulin; D010750:Phosphoproteins; D000252:Calcium-Transporting ATPases