Influence of light on long-term ADP phosphorylation.
ADP phosphorylation coupled to cyclic electron transport was studied over a long period using immobilized chromatophores from Rhodopseudomonas capsulata. Photophosphorylation of ADP as a function of time was continuously measured under different conditions of continuous illumination and concentration of oxygen. Using a red cutoff filter, it was possible to sustain ADP phosphorylation at a maximal rate for more than 10 days, whereas inactivation had always been observed after 5 days when white light was used. The influence of light nature on inactivation was demonstrated using photopigment absorption spectra.
D000244:Adenosine Diphosphate / Q000378:metabolism / Q000528:radiation effects*; D000255:Adenosine Triphosphate / Q000096:biosynthesis; D020130:Bacterial Chromatophores / Q000378:metabolism / Q000528:radiation effects; D008027:Light; D010785:Photophosphorylation; D012241:Rhodopseudomonas / Q000378:metabolism / Q000528:radiation effects
D000244:Adenosine Diphosphate; D000255:Adenosine Triphosphate