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Energized cation transport by Complex III (ubiquinone-cytochromecreductase)

Authors
Publisher
Elsevier Inc.
Publication Date
Volume
97
Issue
3
Identifiers
DOI: 10.1016/0006-291x(80)91455-2

Abstract

Abstract Energized cyclical and net transport of cations and anions has been demonstrated in liposomes containing Complex III using a protamine-aggregation technique. Energization with reduced ubiquinone induces a rapid ion uptake followed by a more gradual efflux upon exhaustion of the available reductant. Both monovalent and divalent cations are transported, but at relatively high concentrations divalent cations are transported in preference to monovalent cations. Results are consistent with a cation:electron ratio of unity.

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