Comparative studies of cytochrome c redox reactions by photochemical lamellar preparations obtained from blue-green, red and green algae, and spinach chloroplasts

Fujita, Y.; Myers, J.

Archives of Biochemistry and Biophysics 113(3): 738-741


ISSN/ISBN: 0003-9861
PMID: 5944973
DOI: 10.1016/0003-9861(66)90256-6
Accession: 024362581

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Sonic treated lamellar preparations of Anabaena cylindrlca, Anacystis nidulans, Porphyridium cruentum, Chlamydomonas reinhardi, and spinach chloroplasts were active in cytochrome c redox reactions, though they lost Hill reaction activity. All preparations gave the same anaerobic redox reactions: cytochrome c was oxidized in the light and reduced to the original redox level in the subsequent dark period. Buffer extracts obtained from the acetone-treated preparations of all organisms tested had the same heat-stable factor with activity for stimulating the anaerobic redox reactions by Anabaena-extracted preparations. Results were taken as evidence that occurrence of a large amount of redox substance (CRS) at system 1 level is a common feature of the photosynthetic systems in these organisms.