. Bacterial photosynthesis. Bacteria -- Physiology; Photosynthesis. 204 METABOLISM AND PHYSIOLOGY period). The initial tangents of the curves (ATP formation rate vs. flash duration) were proportional to light intensity. From these experi- ments it is indicated that the extent of the primary photochemical reaction is proportional to the amount of energy in the short flashes, but utilization of the first chemical product(s) is a dark process and requires a longer time than its production. Rate Of Phosphorylation After Flash A Pi/min/BCHL 8,000 lux + 88A il 28«. ;®M
. Bacterial photosynthesis. Bacteria -- Physiology; Photosynthesis. 204 METABOLISM AND PHYSIOLOGY period). The initial tangents of the curves (ATP formation rate vs. flash duration) were proportional to light intensity. From these experi- ments it is indicated that the extent of the primary photochemical reaction is proportional to the amount of energy in the short flashes, but utilization of the first chemical product(s) is a dark process and requires a longer time than its production. Rate Of Phosphorylation After Flash A Pi/min/BCHL 8,000 lux + 88A il 28«. ;®M = 2I8 15msec. Fig. 3. Effect of HOQNO on rate of phosphorylation after flash (Pi esteri- fied in moles/min/mole bacteriochlorophyll). #—#, no HOQNO; O—Q X 10-8 M HOQNO. Type A illumination, 8000 lux f 88A filter, 28°C. Effect of HOQNO,^ MPM and temperatures on the delayed photophos- phorylation The rates of delayed phosphorylation in the presence ( x 10"^ m) and absence of HOQNO are compared in Fig. 3. It is apparent that the rate of decay of delayed photophosphorylation is markedly lowered by HOQNO. The lower level of phosphorylation under continuous illu- mination, as well as the slower decay of delayed photophosphorylation 1 Abbreviations: HOQNO, 2-^/-heptyl-4-hydroxyquinoline-iV-oxide; MPM, meth- ylphenazonium methosulfate ("phenazine methosulfate").. 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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