Abstract
The structure of the light-harvesting chlorophyll a/bâprotein complex, an integral membrane protein, has been determined at 3.4 à resolution by electron crystallography of two-dimensional crystals. Two of the three membrane-spanning α-helices are held together by ion pairs formed by charged residues that also serve as chlorophyll ligands. In the centre of the complex, chlorophyll a is in close contact with chlorophyll b for rapid energy transfer, and with two carotenoids that prevent the formation of toxic singlet oxygen.
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Kühlbrandt, W., Wang, D. & Fujiyoshi, Y. Atomic model of plant light-harvesting complex by electron crystallography. Nature 367, 614â621 (1994). https://doi.org/10.1038/367614a0
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DOI: https://doi.org/10.1038/367614a0