[Characterization of the (Na+-K+)-ATPase from endometrial plasma membranes of immature mammals]. / Caractérisation de la (Na+-K+)-ATPase de la membrane plasmique des cellules de l'endomètre de mammifères immatures

ABSTRACT

The (Na+-K+)-ATPase in plasma membrane from Mammiferous endometrium is characterized by the Mg/ATP ratio equal to one, and by a distinct affinity for Na+ (1.3 mM) and K+ (2 mM). The activity is maximum for pH 7.4-7.5 in presence of Mg++ 2mM and ATP 2 mM, Na+ 140 mM and K+ 10 mM.