5 rmi in high doses inhibited hydrolytic activity of na+ , k+-atpase of crude and purified heart preparations ( ic50 of 1.7 x 10 ( -4 ) m ) and inhibited ouabain binding to the same enzymes ( ic50 of 1.5 x 10 ( -4 ) m ) .
C0020291
hydrolytic
C0001473
atpase