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13(2),17(3)-Cyclopheophorbide b enol as a catabolite of chlorophyll b in phycophagy by protists.

著者 Kashiyama Y , Yokoyama A , Shiratori T , Inouye I , Kinoshita Y , Mizoguchi T , Tamiaki H
FEBS Lett.2013 Jul 3 ; ():.
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Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan; Department of Environmental and Biological Chemistry, Fukui University of Technology, Fukui, Fukui 910-8505, Japan; Precursory Research for Embryonic Science and Tec

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Both 13(2),17(3)-cyclopheophorbide a and b enols were produced along with ingestion of green microalgae containing chlorophylls a and b by a centrohelid protist (phycophagy). The results suggest that chlorophyll b as well as chlorophyll a were directly degraded to colored yet non-phototoxic catabolites in the protistan phycophagic process. Such a simple process by the predators makes a contrast to the much sophisticated chlorophyll degradation process of land plants and some algae, where phototoxicity of chlorophylls was cancelled through the multiple enzymatic steps resulting in colorless and non-phototoxic catabolites.
PMID: 23831061 [PubMed - as supplied by publisher]
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