Abstract:Structural studies of color visual pigments lag far behind those of rhodopsin for scotopic vision.Using difference FTIR spectroscopy at 77 K, we report the first structural data of three primate color visual pigments, monkey red (MR), green (MG), and blue (MB), where the bathointermediate (Batho) exhibits photoequilibrium with the unphotolyzed state. This photochromic property is highly advantageous for limited samples since the signal-to-noise ratio is improved, but may not be applicable to late intermediates… Show more
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