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Evidence for a trimeric organization of the photosystem I complex from the thermophilic cyanobacterium Synechococcus sp.

By E.J. Boekema, J.P. Dekker, M.G. van Heel, M. Rögner, W. Saenger, I. Witt and H.T. Witt

Abstract

A photosystem I (PS I) reaction center complex was isolated and purified from the cyanobacterium Synechococcus sp. The complex has a molecular mass of about 600 kDa and contains 120 Chl a molecules per photoactive Chl a1 (P-700). Electron micrographs show that the PS I complex has the shape of a disk with a diameter of about 19 nm and a thickness of 6 nm. Computer analysis reveals that the complex is composed of three similar units.

Year: 1987
OAI identifier: oai:ub.rug.nl:dbi/496c7118d83cc
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