Calcium binding proteins in smooth muscle plasma membrane

Rat myometrium plasma membrane showed a number of 45Ca-binding proteins as identified by gel electrophoresis. An attempt was made to identify these either by studying the inhibition of this binding by several ions or by studying binding of these proteins to calmodulin, A9 an antibody against skeletal muscle Ca-binding proteins and Stains-all. On the basis of the molecular weight, calmodulin binding and La-sensitivity of Ca-binding, the …