PHOTOSYNTHETIC PHOSPHORYLATION AND MOLECULAR OXYGEN
نویسندگان
چکیده
منابع مشابه
Stoichiometry of photosynthetic phosphorylation.
The P/2eratio of noncyclic photophosphorylation was investigated in the light of recent reports that it is greater than one and may reflect the existence of two types of electron transport, a phosphorylating and a nonphosphorylating type, superimposed on each other. Our results, obtained under experimental conditions that included those reported to be conducive to high ratios, are consistent wi...
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The oxygen in the atmosphere is derived from light-driven oxidation of water at a catalytic centre contained within a multi-subunit enzyme known as photosystem II (PSII). PSII is located in the photosynthetic membranes of plants, algae and cyanobacteria and its oxygen-evolving centre (OEC) consists of four manganese ions and a calcium ion surrounded by a highly conserved protein environment. Re...
متن کاملPhotosynthetic phosphorylation catalyzed by factors isolated from photosynthetic organisms.
where DaUk converges strongly to Dau in L2(Q). Furthermore, daf(uk)Dv converges strongly to da,,(u)Dv in L2(Q) by dominated convergence. Hence, each term in the sum for a (u k, V) converges to the corresponding term in the sum for a(u, v), (G(uk), v)m . (G(u), v)m for each v in V, and the proof of Lemma 3 is complete. Proof of Theorem 1: By Lemma 2, it suffices to show that the mapping G is one...
متن کاملThe effect of oxygen on riboflavin phosphate-dependent photosynthetic phosphorylation by spinach chloroplasts.
The process of photosynthetic phosphorylation by spinach chloroplasts has been under active investigation since it was discovered by Arnon et aZ. (2). There has been some apparent confusion about the effect of oxygen on this process. Thus Arnon et al. (2) first reported that oxygen was necessary for photophosphorylation, but then concluded in a later paper that “in the presence of the proper co...
متن کاملDifferential effects of desaspidin on photosynthetic phosphorylation.
Sensitivity to low concentrations of desaspidin (5 x 10(-7)m) sharply distinguishes the photophosphorylations associated with the photooxidation of water from all other types of photophosphorylation by isolated chloroplasts. Contrary to recent reports in the literature, the effects of desapidin were not altered by changes in the redox conditions as influenced by the concentration of ascorbate a...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1961
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.47.9.1314