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A transient absorption spectrum has been measured in Rhodopseudomonas spheroides R26 reaction centers. Its salient features… Expand Reaction centers were found to bind two ubiquinones, both of which could be removed by o-phenanthroline and the detergent… Expand A theory of electron transfer between two fixed sites by tunneling is developed. Vibronic coupling in the individual molecules… Expand The widely assumed correspondence between fluorescence and photochemistry in photosynthetic systems has recently been challenged… Expand Reaction center particles isolated from carotenoidless mutant Rhodopseudomonas spheroides were studied with the aim of… Expand Abstract— The ratio of total bacteriochlorophyll (BChl) to reaction center BChl has been determined in the wild‐type and… Expand The equilibrium high-energy state under non-phosphorylating conditions in chromatophores from Rhodospirillum rubrum has been… Expand c or reduced phenazine methosulfate coupled with the reduction of ubiquinone. We wish to report now that chromatophores from… Expand Abstract Chromatophores of Rhodopseudomonas spheroides show reversible light-induced absorbancy changes corresponding to the… Expand It was shown by MacLeod and his co-workers that among bacteria only the true marine forms have a specific sodium requirement… Expand