Treatment of the electron transport membrane fraction of Rhodospirillum rubrum with phospholipase A from the venom of Naja Naja resulted in a stimulation of NADHand succinate-cytochrome c-reductase of the electron transfer chain. The mechanism of this stimulation appears to be identical with that found in the presence of the anionic detergent deoxycholate. At the same time the NADH oxidase syst...

By varying the light intensity and temperature during growth it is possible to obtain cultures of Rhodospirillum molischianum in which the specific bacteriochlorophyll contents differ by as much as fivefold. We used such cultures to compare the changes in the electron microscopic appearance of the cells with the changes in the amount and bacteriochlorophyll content of chromatophore material iso...

Light-harvesting bacteria Rhodospirillum Photometricum were recently found to adopt strikingly different architectures depending on illumination conditions. We present analytic and numerical calculations which explain this observation by quantifying a dynamical interplay between excitation transfer kinetics and reaction center cycling. High light-intensity membranes (HLIM) exploit dissipation a...