RT Journal Article SR Electronic(1) A1 Leach, C. K. A1 Carr, N. G.YR 1970 T1 Electron Transport and Oxidative Phosphorylation in the Blue-green Alga Anabaena variabilis JF Microbiology, VO 64 IS 1 SP 55 OP 70 DO https://doi.org/10.1099/00221287-64-1-55 PB Microbiology Society, SN 1465-2080, AB SUMMARY: The respiratory electron transport system involved in NADPH (2.0 nmoles/ min./mg.) and NADH (1.0 nmoles/min./mg.) oxidation in the dark that was operative in extracts of light-grown Anabaena variabilis has been examined. NADPH oxidation was inhibited 50% by cyanide (2x10−2m), rotenone (10−4 m); antimycin A, amytal and azide were markedly less inhibitory. NADPH: ferrocytochrome c oxidoreductase, NADPH: menadione oxido-reductase, ferrocytochrome c:oxygen oxidoreductase and succinic dehydrogenase were detected. A phosphorylation (0.4 nmoles/min./mg.), associated with NADPH oxidation, was measured, NADPH could be replaced by NADP and isocitrate. This phosphorylation was absolutely dependent upon oxygen and was inhibited 25% by carbonyl cyanide p-trifluoromethoxy-phenylhydrazone (5 μM)., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-64-1-55