Rega A F, Garrahan P J
Biochim Biophys Acta. 1980 Mar 13;596(3):487-9. doi: 10.1016/0005-2736(80)90140-6.
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.