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Spectral characterization of light reducible cytochrome in a plasma membrane enriched fraction and in other membranes from cauliflower brassica oleracea inflorescences


Photochemistry & Photobiology 38(1): 95-98
Spectral characterization of light reducible cytochrome in a plasma membrane enriched fraction and in other membranes from cauliflower brassica oleracea inflorescences
Low temperature spectroscopy has been used to characterize microsomal fractions obtained from cauliflower inflorescences (B. oleracea L.) by differential centrifugation and partition in an aqueous polymer 2-phase system. The plasma membrane-enriched fraction (U3) contained 1 dominant b-cytochrome, which could be reduced both by blue light and by dithionite. An action spectrum of the blue light-induced absorbance change [LIAC, .DELTA.(A430-A410)] associated with the reversible reduction of this b-type cytochrome indicated that the primary light-receptor was a flavin-like compound. Another microsomal fraction (L3) containing membranes from mitochondria, endoplasmic reticulum and other organelles also contained light-reducible cytochrome. One of these could be identified as cytochrome c oxidase, and another may be identical to cytochrome b5 of the endoplasmic reticulum.


Accession: 006459601



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Spectral characterization of light-reducible cytochrome in a plasma membrane-enriched fraction and in other membranes from cauliflower inflorescences. Photochemistry and photobiology 38(1): 95-98, 1983

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