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© 1977 Oxford University Press

RESEARCH-ARTICLE

Translocation of Some Anions, Cations, and Acids in Turnip (Brassica napus L.) Mitochondria

ANTHONY L. MOORE 1 and S. BRIAN WILSON

Department of Biochemistry, University of Aberdeen, Marischal College Aberdeen, AB9 1AS, U.K.

The translocation of various anions, cations, and acids across the membrane system of turnip mitchondria has been investigated by light scattering techniques. The results imply that the membranes of turnip mitochondria are not permeable to choline, K+, Na+, , , , and . It has been established that Cl–, , and SCN– passively permeate the mitochondrial membrane. It is probable that permeates as NH3 and that and cross the membrane either as the corresponding acid or on an anion/ hydroxide antiporter. The alkali metals Na+ and K+ equilibrate across the membrane via specific H+/Na+ and H+/K+ antiporters, having similar activity at neutral pH.


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