. Bacterial photosynthesis. Bacteria -- Physiology; Photosynthesis. PHOTOPHOSPHORYLATION IN FLASHING LIGHT 205 in the presence of HOQNO, is probably due to inhibition of electron transfer between cytochromes b and c (8), The rate of photophosphorylation is markedly increased by MPM under sufficient illumination (22,23), The rates of phosphorylation after the flashes were calculated from a flashing light experiment. A remarkable acceleration of decay of delayed phosphorylation by the added MPM was noticed. The effect of MPM on the kinetics of delayed photophosphorylation was like a reversal of
. Bacterial photosynthesis. Bacteria -- Physiology; Photosynthesis. PHOTOPHOSPHORYLATION IN FLASHING LIGHT 205 in the presence of HOQNO, is probably due to inhibition of electron transfer between cytochromes b and c (8), The rate of photophosphorylation is markedly increased by MPM under sufficient illumination (22,23), The rates of phosphorylation after the flashes were calculated from a flashing light experiment. A remarkable acceleration of decay of delayed phosphorylation by the added MPM was noticed. The effect of MPM on the kinetics of delayed photophosphorylation was like a reversal of the effect caused by HOQNO. APj/min/BCHL 8 Cycles 16,000 IUX + 88A Control. msec. Light Period Fig. 4. Effect of MPM on photophosphorylation in Type B illumination. Ordinate: Pi esterified in moles/min/naole bacteriochlorophyll. Abscissa: length of light period. no MPM: -, X 10--^ M MPM. 16,000 lux + 88A filter, 28°C. In the second set of experiments, the effect of MPM on the light- induced phase of photophosphorylation was investigated. The rate of phosphorylation was proportional to the length of the flash when the flash duration was sufficiently short. The tangents of these two curves were identical in the absence and presence of MPM (Fig. 4).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Symposium on Bacterial Photosynthesis (1963 : Yellow Springs, Ohio); Charles F. Kettering Research Laboratory (Yellow Springs, Ohio); Gest, Howard. Yellow Springs, Ohio, Antioch Press
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