魚類よりLuteinの3-Epimer(Calthaxanthin,3′-Epilutein)の分離および確認〔魚類のカロテノイドに関する比較生化学的研究-17-〕

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The two stereoisomeric β, ε-carotene-3, 3'-diol were isolated from lutein fraction of the integuments in various fishes (44 species). These carotenoids were identified as lutein and 3'-epilutein (calthaxanthin) by two direct thin-layer chromatographic comparison with authentic lutein, natural calthaxanthin, synthetic lutein and synthetic 3'-epilutein. Lutein fraction, which has hitherto been identified as a single carotenoid, was a mixture of two stereoisomers, lutein and 3'-epilutein. From the experimental results about lutein fraction from extensive species of fishes, 3'-epilutein was generally dominant in the integuments although the ratio of lutein to 3'-epilutein varied to the species of fish.
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