at a maximum steady state rate of mgatp hydrolysis by the membrane-bound atpase , 20 to 40 % of the atpase subunits of 100,000 daltons are in a phosphorylated form , while only 0.8 % of the subunits of the purified atpase are phosphorylated under the same conditions .
C0020291
hydrolysis
C0001473
atpase