it is shown that effects of mg2+ on measurements of atpase activity as a function of atp concentration at ph 8.0 and ph 8.5 are consistent with binding of mg2+ to the ca2 ( + ) -binding sites on the phosphorylated atpase , such binding inhibiting dephosphorylation of the atpase .
C0001476
ca2
C0001473
atpase