partial tryptic cleavage of the ca2 ( + ) -atpase into the a1 , a2 and b fragments did not promote the reaction of anti-a1 antibodies with sarcoplasmic reticulum vesicles , but solubilization of the membrane with c12e8 rendered the antigenic site fully accessible to several of them , suggesting that their epitopes are located in areas of contacts between atpase molecules .
C0001476
ca2
C0001473
atpase