EurekaMag.com logo
+ Translate

Riboflavin-sensitized photoprocesses of tryptophan


, : Riboflavin-sensitized photoprocesses of tryptophan. Journal of Photochemistry & Photobiology B Biology 23(1): 43-48

The photodegradation of tryptophan in oxygen saturated aqueous solution sensitized by riboflavin is accompanied by the generation of the following reactive oxygen species: 1O-2, OH., H-2O-2 and O-2.-. When parallel photodegradation experiments are run with 14C-riboflavin in one case and 14C-tryptophan in the other and the irradiation products are separated by Sephadex G-15 and C-18-HPLC, the generation of the following species is detected: aggregate forms of riboflavin, indolic products associated to flavins, indolic products of molecular weight higher than tryptophan, formylkynurenine, and other tryptophan photodecomposition products. The significance of the riboflavin anion radical and tryptophan cation radical as intermediates in the photoproduct formation is discussed.

Accession: 009359795

PMID: 8021750

DOI: 10.1016/1011-1344(93)06984-b

Download PDF Full Text: Riboflavin-sensitized photoprocesses of tryptophan


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Related references

Silva E.; Rueckert V.; Lissi E.; Abuin E., 1991: Effects ph and ionic micelles on the riboflavin sensitized photoprocesses of tryptophan in aqueous solution. The effects of pH and ionic micelles on the rates of product formation following irradiation of riboflavin in the presence of tryptophan were investigated by absorption and fluorescence spectroscopy. Under anaerobic conditions, formation of ribofl...

Silva, E.; Rückert, V.; Lissi, E.; Abuin, E., 1991: Effects of pH and ionic micelles on the riboflavin-sensitized photoprocesses of tryptophan in aqueous solution. The effects of pH and ionic micelles on the rates of product formation following irradiation of riboflavin in the presence of tryptophan were investigated by absorption and fluorescence spectroscopy. Under anaerobic conditions, formation of ribofl...

Silva E., 1992: Biological implications of aerobically obtained riboflavin sensitized photoproducts of tryptophan. Journal of Photochemistry & Photobiology B Biology 14(1-2): 142-144

Silva, E.; Edwards, A.M., 1996: Generation of radical species by irradiation of tryptophan and tyrosine solutions sensitized by riboflavin Biological implications. Ciencia e Cultura (Sao Paulo) 48(1-2): 47-50

Uehara, K.; Mizoguchi, T.; Kishida, K.; Mannen, S., 1971: Studies on sweet potato beta-amylase. II. Susceptibility of tryptophan to the riboflavin-sensitized photooxidation in the presence of adenine. Journal of Biochemistry 69(1): 27-33

Anonymous, 1971: Studies on sweet potato d beta amylase ec 3212 part 2 susceptibility of tryptophan to the riboflavin sensitized photo oxidation in the presence of adenine

Arutyunyan A.G.; Kayushin L.P.; Lozinova T.A.; Nedelina O.S.; Oganesyan V.A., 1990: Non linear photoprocesses in aqueous solutions of riboflavin and adp in a laser radiation field. The efficiencies of non-linear photodecomposition of riboflavine and energy transfer in a complex of adenosine diphosphate with riboflavine on exposure to potent laser radiation have been investigated. Non-linear absorption and fluorescence spectr...

Arutyunyan A.G.; Kayushin L.P.; Lozinova T.A.; Nedelina O.S.; Oganesyan V.A., 1990: Non linear photoprocesses in aqueous solutions of riboflavin and adp in the field of laser radiation. Efficiencies of non-linear photodissociation of riboflavin and energy transfer in adenosindiphosphate-riboflavin complex under the effect of powerful laser radiation were investigated. Basic parameters of two-quantum processes in riboflavin were d...

Görner, H., 2001: Direct and sensitized photoprocesses of bis-benzimidazole dyes and the effects of surfactants and DNA. The photoprocesses of two bis-benzimidazole dyes, Hoechst 33258 (1) and an analog, where the phenolic group in p-position is replaced by an ethoxy group, Hoechst 33342 (2), were studied. For 1 and 2 in aqueous solution the quantum yield of fluores...

Goerner, Helmut, 2001: Direct and sensitized photoprocesses of bis-benzimidazole dyes and the effects of surfactants and DNA. The photoprocesses of two bis-benzimidazole dyes, Hoechst 33258 (1) and an analog, where the phenolic group in p-position is replaced by an ethoxy group, Hoechst 33342 (2), were studied. For 1 and 2 in aqueous solution the quantum yield of fluores...