the present study demonstrated the presence within the myocardium of phosphoprotein phosphatase activity which can account for dephosphorylation of a 22,000 dalton phosphoprotein of cardiac sarcoplasmic reticulum that has been associated with the stimulatory effects of adenosine 3':5'-monophosphate ( cyclic amp ) -dependent protein kinase on calcium transport ( tada , m. , kirchberger , m .
C0027061
myocardium
C0018787
cardiac