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PHOTOREACTIONS OF THE CHROMOPHORE CATIONS OF DENATURED SPECIES OF C‐PHYCOCYANIN AND ALLOPHYCOCYANIN
Author(s) -
Kok Jacob de
Publication year - 1982
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.1751-1097.1982.tb02657.x
Subject(s) - chromophore , chemistry , allophycocyanin , phycocyanin , phycobiliprotein , ethylene glycol , photochemistry , formic acid , denaturation (fissile materials) , organic chemistry , nuclear chemistry , cyanobacteria , biology , bacteria , genetics
— C‐phycocyanin dissolved in buffer containing 75% ethylene glycol (vol/vol) shows photorevers‐ible reactions which are ascribed to the interconversion by light of two species: PC r , PC g . After denaturation with formic acid, the chromophore cation of PC g , can be irreversibly photoconverted to that of PC r A conversion of the chromophore of denatured PC g , to that of denatured PC r also occurs after adjustment of the pH to about 8. Under the same conditions the chromophore of allophycocyanin shows similar reactions. Moreover, the reactions of the chromophores of the denatured species of these phycobiliproteins are similar to the reactions of the chromophore of the denatured species P fr of photochrome.