Raman spectroscopic evidence for the microenvironmental change of some tyrosine residues of lens proteins in cold cataract |
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| Authors: | A Mizuno Y Ozaki K Itoh S Matsushima K Iriyama |
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| Affiliation: | 1. Department of Ophthalmology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan 105;2. Division of Biochemistry, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan 105;3. Department of Chemistry, School of Science and Engineering, Waseda University, Shinjuku-ku, Tokyo, Japan 160 |
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| Abstract: | We found new photochemical intermediate of third rhodopsin-like pigment (tR) or slow cycling rhodopsin-like pigment (sR) in Halobacterium halobium, which was produced by simultaneous illumination with red and blue light. This illumination is employed for measurements of negative phototaxis. The formation of this intermediate is fast. (With the instrument used, it could not be measured.) The half-time of its decay is ca 150 msec in 4 M NaCl, pH 7.0 at 20 degrees C. The maximum of absorbance is located at 510-530 nm. |
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