although these phosphoprotein phosphatases also catalyzed the dephosphorylation of phosphorylase a , glycogen synthase b , and phosphorylated h1 and h2b histones , the phosphatases differed from each other in preferences for substrates and the mg2+ or mn2+ requirements for their activities .
C0031686
phosphoprotein phosphatases
C1158884
dephosphorylation