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Photoreactions of bacteriorhodopsin (1977)

Stoeckenius, Walther ; Lozier, Richard H. ; Niederberger, Werner

Springer

European biophysics journal 3 (1977), S. 65-68

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ISSN: 1432-1017

Keywords: Light energy transduction ; Purple membrane ; Halobacteria ; Proton transport ; Spectroscopy

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Physics

Notes: Abstract Bacteriorhodopsin is a membrane-bound light energy transducer which generates an electrochemical proton gradient. It undergoes a cyclic photoreaction in which five intermediates have been identified. During the cycle it releases a proton from one surface of the membrane and takes up a proton on the opposite surface. The active chromophore consists of retinal bound through a Schiff base to the protein. The Schiff base is deprotonized during the photoreaction cycle and appears to be involved in the transport of protons through the membrane. The retinal may also undergo an isomerization.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00536456

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