Plasma Membrane Adenosine Triphosphatase of Oat Roots: Activation and Inhibition by Mg2+ and ATP 1
AUTOR(ES)
Balke, Nelson E.
RESUMO
ATPase activity of plasma membrane vesicles isolated from oat (Avena sativa L. cv. Goodfield) roots was examined in the presence of various concentrations of MgCl2 and ATP. A Mg2+: ATP ratio of about 1 was required for maximal activity regardless of the concentrations used; the optimum concentration for both Mg2+ and ATP was 9 mm. Based on the ATPase activity at different concentrations of complexed Mg·ATP and free ATP, it is concluded that Mg·ATP is the true substrate of this enzyme.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=541555Documentos Relacionados
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