Interchangeability of Phosphorylation Coupling Factors in Photosynthetic and Respiratory Energy Conversion

See allHide authors and affiliations

Science  29 Oct 1971:
Vol. 174, Issue 4008, pp. 514-516
DOI: 10.1126/science.174.4008.514


The nonsulfur purple photosynthetic bacterium Rhodopseudomonas capsulata can obtain energy for growth either by anaerobic photophosphorylation or dark oxidative (aerobic) phosphorylation. Successful resolution of phosphorylation coupling factors from energy-converting membranes of this bacterium permitted tests for reciprocal function of such protein factors in oxidative-and photophosphorylation processes. Evidence was obtained for the interchangeability of coupling factor preparations from dark-grown and photosynthetically grown cells in both kinds of energy conversion.