Abstract
Use of the resonance Raman technique has shown that the colour of the purple membrane pigment of H. halobium arises from an unprotonated Schiff base whose electron density is perturbed by further (electrostatic) interaction with a protein. The chromophore probably consists of a charge transfer complex between retinyllysine and an appropriate side chain of the protein.
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MENDELSOHN, R. Resonance Raman Spectroscopy of the Photoreceptor-like Pigment of Halobacterium halobium. Nature 243, 22–24 (1973). https://doi.org/10.1038/243022a0
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DOI: https://doi.org/10.1038/243022a0
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