Bacteriorhodopsin induces a light-scati’ering change in Halobacterium Halobium

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Abstract

When suspensions of Halobacterium halobium are exposed to bright light, the light-scattering properties of the bacteria change. This light-scattering response can produce a transmission decrease of about 1 throughout the red and nearinfrared region. The action spectrum for the light-scattering response appropriately matches the absorption spectrum of bacteriorhodopsin. The response is eliminated by cyanide p-trifluoro-methoxyphenylhydrazone, a proton ionophore, and by triphenylmethylphosphonium, a membrane permanent cation. A mild hypertonic shock induces a similar light-scattering change, suggesting that bright light causes the bacteria to shrink about 1 in volume, thereby producing the light-scattering response. © 1978, Rockefeller University Press., All rights reserved.

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Wey, C. L., Ahl, P. L., & Cone, R. A. (1978). Bacteriorhodopsin induces a light-scati’ering change in Halobacterium Halobium. Journal of Cell Biology, 79(3), 657–662. https://doi.org/10.1083/jcb.79.3.657

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