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Biological Membrane Structure, II. A Detailed Model for the Retinal Rod Outer Segment Membrane
G. Vanderkooi and M. Sundaralingam
Proceedings of the National Academy of Sciences of the United States of America
Vol. 67, No. 1 (Sep. 15, 1970), pp. 233-238
Published by: National Academy of Sciences
Stable URL: http://www.jstor.org/stable/60136
Page Count: 6
You can always find the topics here!Topics: Lipids, P branes, Molecules, Retinal rods, X ray diffraction, Electron density, Electron micrographs, Diameters, Polar regions, Surface water
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A model, based on the available chemical, electron microscopic, and x-ray diffraction data, has been developed for the structure of the retinal rod outer segment membranes. The model consists of a double layer of globular protein molecules, with lipid bilayer filling the spaces between the proteins. The electron density across the membrane has been calculated and shown to be in agreement with that found by x-ray diffraction. The protein molecules ``float'' half submerged in a lipid field; this serves to orient them in the same way at all times relative to incident radiation in the intact retina.
Proceedings of the National Academy of Sciences of the United States of America © 1970 National Academy of Sciences