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Title: The low-temperature luminescence of aromatic amino acids in peptides and proteins
Author: King, Leslie A.
ISNI:       0000 0001 3599 7945
Awarding Body: Loughborough University of Technology
Current Institution: Loughborough University
Date of Award: 1972
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The aromatic amino acids, tryptophan and tyrosine exhibited fluorescence and phosphorescence at 77°K; phenylalanine was found to be non-luminescent. The luminescence elf peptides and proteins containing tryptophan was dominated by that amino acid. In general, tyrosine emission was only observed in the absence of tryptophan. This effect is explained in terms of energy transfer from the excited singlet state of tyrosine to tryptophan. The luminescence characteristics of tryptophan and tyrosine were sensitive to numerous environmental factors. In polar media and in the vicinity of a tyrosinate anion, the relative phosphorescence quantum yield of tryptophan was enhanced. The reverse occurred in apolar media. In addition, the excited states of tryptophan and tyrosine were perturbed by a heavy atom effect.
Supervisor: Not available Sponsor: Science Research Council
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Chemical Sciences not elsewhere classified