Bacteriorhodopsin (BR570) bathochromic band shift in an external electric field |
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Authors: | Galina P Borisevitch EP Lukashev AA Kononenko AB Rubin |
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Institution: | Department of Biology, Moscow State University, Moscow 117234 U.S.S.R. |
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Abstract: | In dry films of bacteriorhodopsin-containing purple membranes from Halobacterium halobium the external electric field (104–105 V · cm?1) induces the appearance of a product spectrally close to the initial intermediate of bacteriorhodopsin (BR) photochromic cycle (batho form, K). This result and also preliminary data of the electret-thermal analysis of the preparations suggest that the dielectric polarization in chromophore-protein-lipid complexes might be an essential step of the primary stabilization of light energy in photo-bioenergetic processes. |
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Keywords: | Bacteriorhodopsin Bathochromic shift Electric field Purple membrane (Halo bacterium halobium) BR bacteriorhodopsin |
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