title: Cation-activated ATPase activity of plasmalemma-enriched membrane preparations from maize coleoptiles.
abstract: The ATPase activity present in plasmalemma-enriched preparations from maize coleoptiles shows an optimum at pH 6, a strong dependence on Mg(2+), and is stimulated by K(+) and other monovalent cations, both organic and inorganic. The activation of ATPase by K(+) obeys Michaelis Menten kinetics, saturation being reached at 50 mM K(+) concentration. K(+), Mg(2+)-stimulated ATPase activity is strongly inhibited by N,N'-dicyclohexylcarbodiimide and by diethylstilbestrol and, to a lesser extent, by octylguanidine.
authors: Centro di Studio del C.N.R. per la Biologia Cellulare e Molecolare delle Piante, Istituto di Scienze Botaniche, Università di Milano, Via Giuseppe Colombo, 60, I-20133, Milano, Italy.
authors: N
authors: N
authors: Beffagna
authors: E
authors: E
authors: Marre
authors: S M
authors: SM
authors: Cocucci