Photoreduction of parathion by spinach chloroplasts.
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چکیده
منابع مشابه
Photoreduction of sulfur dioxide by spinach leaves and isolated spinach chloroplasts.
Labeled sulfur dioxide was found to be extensively absorbed by spinach (Spinacea oleracea L.) leaves. Labeled sulfides detected in leaf blades following fumigations with sulfur dioxide in light indicated that photoreduction of sulfur dioxide had occurred. Measurable proportions of this labeled sulfur was localized within the chloroplast fraction. Suspensions of isolated chloroplasts supplied wi...
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Ferricyanide was used as a Hill oxidant to localize the site of photoreduction in chloroplast lamellae. The ferrocyanide formed on illumination was complexed with copper ions to form insoluble, electron-dense precipitates of Cu ferrocyanide, which can be easily seen in unstained preparations in the electron microscope. Control experiments showed no precipitates in the dark, at zero time, in the...
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Spinach chloroplasts catalyse the incorporation of Fe(2+) into protoporphyrin, mesoporphyrin and deuteroporphyrin to form the corresponding haems. This ferrochelatase activity was detected by pyridine haemochrome formation with acetone-dried powders of chloroplasts, or from the formation of [(59)Fe]haems by intact chloroplasts. Decreasing the mitochondrial contamination of the chloroplasts by d...
متن کاملPhotoreduction and Photooxidation of Cytochrome C by Spinach Chloroplast
The photoreduction of cytochrome c by spinach chloroplasts has been noted by several investigators (12, 20, 25). In a preliminary report, we have presented evidence that aqueous digitonin extracts of spinach chloroplasts contain a cytochrome c photooxidase (22) which appears to be similar to the photooxidase present in extracts of photosynthetic bacteria studied by Kamen and Vernon (13, 14, 32)...
متن کاملPhotophosphorylation by digitonin-fragmented spinach chloroplasts.
Digitonin has been used successfully to disrupt particulate structures such as mitochondria without loss of their capacity for causing oxidative phosphorylation (1, 2). The present report describes a procedure whereby spinach chloroplasts were extensively disrupted by digitonin extraction to give a preparation of small fragments which could cause an appreciable rate of photophosphorylation. In ...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1975
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.23.2175