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FLAVINS IN LIPOSOMES‐ANOMALOUS PHOTOCHEMICAL EFFECTS AT HIGH PIGMENT CONCENTRATIONS
Author(s) -
HEELIS P. F.,
PHILLIPS G. O.,
LENCI F.,
COLOMBETTI G.
Publication year - 1989
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1989.tb04119.x
Subject(s) - flavin group , riboflavin , liposome , chromophore , photochemistry , flash photolysis , lecithin , chemistry , quenching (fluorescence) , pigment , biophysics , fluorescence , chromatography , biochemistry , reaction rate constant , kinetics , organic chemistry , optics , biology , enzyme , physics , quantum mechanics
Laser flash photolysis of riboflavin tetrabutyrate incorporated in lecithin liposomes has been studied as a function of the number of flavins per liposome, N RFTB. Both the flavin triplet decay rate and its susceptibility to quenching by oxygen and glycyl‐tyrosine depend markedly on the value of N RFTB. The results are interpreted on the basis of the existence of two distinct locations for the flavin chromophore within the liposome structure.