sarcoplasmic reticulum membrane phosphorylation , mediated by either endogenous cyclic amp-independent or exogenous cyclic amp-dependent protein kinase , occurred on a 100 000 dalton protein and both enzyme activities resulted in enhanced calcium uptake and ca2+-dependent atpase ( atp phosphohydrolase , ec 3.6.1.3 ) , in a manner similar to cardiac microsomal preparations .
C0001476
ca2
C0001473
atp phosphohydrolase