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Science 11 October 1963:
Vol. 142. no. 3589, pp. 234 - 235
DOI: 10.1126/science.142.3589.234
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Articles

Cytochromes of a Blue-Green Alga: Extraction of a c-Type with a Strongly Negative Redox Potential

Raymond W. Holton 1 and Jack Myers 1

1 Department of Zoology, University of Texas, Austin 78712

Aqueous extraction of lyophilized Anacystis nidulans cells followed by chromatography on diethylaminoethyl cellulose separates three different c-type cytochromes. Of the two present in highest concentration, cytochrome-554 has a + 0.35-volt redox potential and resembles the cytochrome f of other photosynthetic tissues, while cytochrome-549 has a -0.26-volt potential. The possible participatidn of cytochrome-549 in electron transport in photosynthesis in this alga at a more negative oxidation-reduction potential than previously postulated for any cytochrome is inferred from the similarities in its spectra to the light-induced spectral changes in vivo observed by others.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Cytochrome c550 in the Cyanobacterium Thermosynechococcus elongatus: STUDY OF REDOX MUTANTS.
D. Kirilovsky, M. Roncel, A. Boussac, A. Wilson, J. L. Zurita, J.-M. Ducruet, H. Bottin, M. Sugiura, J. M. Ortega, and A. W. Rutherford (2004)
J. Biol. Chem. 279, 52869-52880
   Abstract »    Full Text »    PDF »
Structural and EPR Characterization of the Soluble Form of Cytochrome c-550 and of the psbV2 Gene Product from the Cyanobacterium Thermosynechococcus elongatus.
C. A. Kerfeld, M. R. Sawaya, H. Bottin, K. T. Tran, M. Sugiura, D. Cascio, A. Desbois, T. O. Yeates, D. Kirilovsky, and A. Boussac (2003)
Plant Cell Physiol. 44, 697-706
   Abstract »    Full Text »    PDF »


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