10 mm ca-2+ inhibited soluble protein phosphokinase activity approximately 80 % both in the presence and absence of 5-10 minus 7 m cyclic amp whereas the same concentrations of ca-2+ inhibited the membrane-bound enzyme by approximately 60 % in the presence of 5-10-minus 7 m cyclic amp and 40 % in the absence of cyclic amp .
C0001413
5
C0001455
cyclic amp