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- W1970452457 abstract "The synthetic derivatives of β-homo-tyrosine (βHty), an analogue of tyrosine with an extra —CH2— incorporated between the carboxylic group and the CH carbon, modified at the amino group (free or acetylated), carboxyl group (free or amidated) and/or phenolic oxygen (free or methylated), were the subject of fluorescence studies and theoretical calculations in order to establish whether the rotamer model can be used to explain the fluorescence quenching of tyrosine. The N-acetylated derivatives of βHty with ionized carboxylate display biexponential fluorescence decay, whereas the other compounds show monoexponential fluorescence decay. Biexponential decay is assumed to be a result of the presence of low-energy conformers with a sufficiently high energy barrier to make them stable within the fluorescence timescale. The presence of stable conformers has been demonstrated by molecular mechanics and dynamics calculations. Moreover, in the case of βHty derivatives, the fluorescence quenching ability of the amide group depends on the distance between the chromophore, protonated amino and amide groups." @default.
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- W1970452457 date "1996-12-01" @default.
- W1970452457 modified "2023-10-10" @default.
- W1970452457 title "The photophysics of β-homo-tyrosine and its simple derivatives" @default.
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- W1970452457 doi "https://doi.org/10.1016/s1010-6030(96)04409-7" @default.
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