radiation inactivation of partially purified ( na+ + k+ ) -atpase ( atp phosphohydrolase , ec 3.6.1.3 ) from pig kidney outer medulla shows that the target size for rb+ occlusion by the enzyme ( in the absence of phosphorylation ) is much smaller than the target size for p-nitrophenyl phosphatase activity , which is itself smaller than the reported target size for ( na+ + k+ ) -atpase activity .
C0001479
na
C0001473
atp