Cytochrome c Reducing Substances in Photosynthetic Electron Transport
Open Access
- 1 December 1973
- journal article
- research article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung C
- Vol. 28 (11-12) , 717-721
- https://doi.org/10.1515/znc-1973-11-1212
Abstract
Photosynthetic cytochrome c reduction by isolated chloroplasts is mediated by substances with characteristics of a "Cytochrome c Reducing Substance" (CRS). A water soluble extract of ether treated, lyophilized chloroplasts (called Sʟ-eth), related to the primary acceptor complex of photo system I, has CRS-activity. It contains p-coumaroyl-meso-tartaric acid. By comparison with model substances, the CRS-activity in chloroplasts is attributed to the iron complex of this compound. A number of other iron complexes and numerous quinones with redox potentials from - 220 mV to + 300 mV are also shown to possess CRS-activity. The CRS preparation from the blue green alga Anabaena cylindrica, as first described by Fujita and Myers, contains Fe3+/EDTA, which has all the chemical and functional properties as reported for CRSKeywords
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