Journal Article

A Sodium Pump in the Plasma Membrane of the Marine Alga <i>Heterosigma akashiwo</i>

Mariko Shono, Yukichi Hara, Masato Wada and Tadashi Fujii

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 37, issue 3, pages 385-388
Published in print April 1996 | ISSN: 0032-0781
e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/oxfordjournals.pcp.a028957
A Sodium Pump in the Plasma Membrane of the Marine Alga Heterosigma akashiwo

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ATP-dependent transport of 22Na+ into liposomes reconstituted from plasma membrane proteins of Heterosigma akashiwo was examined. The apparent Km values for transport of Na+ were 400 μM for ATP and 7 mM for Na+. ATP-dependent transport of 22Na+ was not inhibited by a protonophore or a membrane-permeable cation but was inhibited by an inhibitor of P-type ATPases.

Keywords: Heterosigma akashiwo; Marine alga; Na+ transport; Na+-ATPase [EC 3.6.1.3]; Plasma membrane

Journal Article.  0 words. 

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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