INFLUENCE OF ENERGY TRANSFER ON THE PHOTOIONIZATION OF TRYPTOPHAN AND TYROSINE IN BASIC MEDIA †

@article{Santus1972INFLUENCEOE,
  title={INFLUENCE OF ENERGY TRANSFER ON THE PHOTOIONIZATION OF TRYPTOPHAN AND TYROSINE IN BASIC MEDIA †},
  author={Rene C. Santus and Marc Bazin and M. Aubailly and R Guermonprez},
  journal={Photochemistry and Photobiology},
  year={1972},
  volume={15}
}
Abstract— The luminescence studies of the delayed isothermal and light stimulated recombinations of photoejected electrons with photoionized chromophores at 77°K show that in the peptide tryptophyltyrosine, where energy transfer occurs at the singlet level from tryptophan to tyrosine and at the triplet level from tyrosine to tryptophan, tryptophan photoionization is greatly enhanced. This increase in photoionization efficiency is attributed to triplet‐triplet transfer. 
9 Citations

Factors affecting the luminescence of tryptophan at 77 K.

FLASH PHOTOLYSIS OF AQUEOUS TRYPTOPHAN, ALANYL TRYPTOPHAN AND TRYPTOPHYL ALANINE

Abstract— Tryptophan has been flash photolysed in deoxygenated and air equilibrated solutions. The kinetics of the subsequent reactions of the tryptophyl radical and the hydrated electron have been

THE PHOTOLYSIS OF TRYPTOPHAN IN THE PRESENCE OF OXYGEN

Oxygen is playing a major role in the photochemical decomposition and it is proposed that the major reaction which occurs, under normal atmospheric conditions, is the reaction of the lowest triplet excited state of tryptophan with oxygen.

Effect of amino group charge on the photooxidation kinetics of aromatic amino acids.

It has been established that the presence of charged amino group changes oxidation rates by a significant factor; i.e., His with a positively charge amino group quenches the TCBP triplets 5 times more effectively than N-AcHis and His withA neutral amino group.

THE PHOTOLYSIS RATES OF SOME DI‐ AND TRIPEPTIDES OF TRYPTOPHAN

The products appeared to differ greatly among the various peptides studied; Trp,trp‐Gly, and Trp‐Leu gave oxidation products, while Gly‐Trp and Leu‐TrP apparently gave ring closure products, not requiring oxygen.

SPIN‐TRAPPING and ESR STUDIES OF THE DIRECT PHOTOLYSIS OF AROMATIC AMINO ACIDS, DIPEPTIDES, TRIPEPTIDES and POLYPEPTIDES IN AQUEOUS SOLUTIONS—III. TRYPTOPHAN and RELATED COMPOUNDS

Abstract— The UV photolysis of tryptophan (Trp) and Trp‐containing peptides in aerated aqueous solutions has been studied by ESR and spin‐trapping techniques using f‐nitrosobutane as the spin‐trap.

Free radical initiation in proteins and amino acids by ionizing and ultraviolet radiations and lipid oxidation--Part 22: ultraviolet radiation and photolysis.

This review is a detailed comparison of gamma radiation, UV radiation, and lipid oxidation for what is presently known concerning the specific modes of energy deposition and free radical formation, the free radicals formed in proteins and amino acids, and the typical damage correlating with these radicals.

Ultraviolet Radiation Effects on the Human Eye

This chapter comprehensively cover what is known about UV radiation damage to all ocular tissues and studies the question of UV radiation-induced aging or damage to the retina, perhaps one of the most exciting new directions in ophthalmology and human biology research.

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It is shown here how to identify the Na6(CO3(SO4)2(SO3)2, Na2SO4, and Na2CO3 (Na2CO4) deposits in the Na2O2 mixture using a simple, straightforward, and inexpensive apparatus.

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