. Bacterial photosynthesis. Bacteria -- Physiology; Photosynthesis. DISULFIDE PHOTOREDUCTION 311 induction, as illustrated by the effect of acetone (Fig. 3), The induction period is characteristic of a large number of light-activated redox processes in chromatophores, including photooxidation and photore- duction reactions, and is freely reversible; , particles carrying out photo reactions undergo induction periods again when diluted with Preincubation - Light, DPIP-/ Ascorbate/ / Dark, DPIP- Ascorbate. .c- 5 10 Time, Minutes Fig. 4. Preincubation effect on induction period during
. Bacterial photosynthesis. Bacteria -- Physiology; Photosynthesis. DISULFIDE PHOTOREDUCTION 311 induction, as illustrated by the effect of acetone (Fig. 3), The induction period is characteristic of a large number of light-activated redox processes in chromatophores, including photooxidation and photore- duction reactions, and is freely reversible; , particles carrying out photo reactions undergo induction periods again when diluted with Preincubation - Light, DPIP-/ Ascorbate/ / Dark, DPIP- Ascorbate. .c- 5 10 Time, Minutes Fig. 4. Preincubation effect on induction period during disulfide photo- reduction. Chromatophores were preincubated in light and dark with and without an ascorbate-indophcnol system for 10 minutes. The methyl viologen-DTNB acceptor system was then added and the reaction followed spectrophotometrically in light. Atmosphere, helium. media of low ionic strength. Finally, the induction period is inversely proportional to ionic strength over a wide range. The reversibility of the induction period suggested an "active" process associated with photochemical electron transport in chroma- tophores. Consequently, the effects of preincubation of chromatophores in light and dark under various conditions on subsequent photochemical activity of the particles were examined. Data in Fig. 4 show that in a. 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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