an atp-hydrolyzing activity with the properties of a mg ( 2+ ) -dependent ( na ( + ) , k ( + ) ) -atpase ( atp phosphohydrolase , ec 3.6.1.3 ) from a 20-fold purified plasma membrane fraction of the marine diatom , nitzschia alba is described .
C0001479
na
C0001473
atp phosphohydrolase