| Literature DB >> 1472491 |
A Maeda1, J Sasaki, Y J Ohkita, M Simpson, J Herzfeld.
Abstract
In the photoreaction of bacteriorhodopsin, the L intermediate shows an intense band at 3486 cm-1 which is unaffected by 2H2O (Maeda, A., Sasaki, J., Shichida, Y., & Yoshizawa, T. (1992) Biochemistry 31, 462-467]. This band is shifted to 3477 cm-1 by [indole-15N]tryptophan substitution and therefore is assigned to the N-H stretching vibration of the indole of tryptophan. Free indole in carbon tetrachloride shows its N-H stretching vibration at 3491 cm-1 [Fuson, N., Josien, M.-L., Powell, R. L., & Utterback, E. (1952) J. Chem. Phys. 20, 145-152]. Thus, it is suggested that at least one tryptophan residue in the L intermediate is not hydrogen bonded.Entities:
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Year: 1992 PMID： 1472491 DOI： 10.1021/bi00165a001
Source DB: PubMed Journal: Biochemistry ISSN： 0006-2960 Impact factor: 3.162