メバチThunnus obesusのカロテノイド成分とそれらの代謝

概要

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The carotenoids from the bright yellow coloured finlet of big-eye tuna Thunnus obesus were investigated. Tunaxanthin B (17.9%) (8) and C (36.2%) (9) were identified as major carotenoids. Further-more, (6S, 6'S)-(1.6%) (1), (6R, 6'S: meso)-(1.5%) (2), (6R, 6'R)-ε, ε-carotene-3, 3'-dione (0.5%) (3), (3R, 6R, 6'R)-(2.3%) (4), (3S, 6S, 6'S)-(5.9%) (5), (3R, 6S, 6'S)-(9.3%) (6), (3R, 6S, 6'R)-3-hydroxy-ε, ε-caroten-3'-one (7.3%) (13), tunaxanthin A (4.2%) (7), D (7.8%) (10), H (4.0%) (11) and I (trace) (12) were also identified. A new carotenoid, (3R, 6S, 6'R)-3-hydroxy-ε, ε-caroten-3'-one (13) was first isolated. From the experimental results obtained, we proposed the presence of the reductive meta-bolic pathways, ε, ε-carotene-3, 3'-diones to tunaxanthins via 3-hydroxy-ε, ε-caroten-3'-ones, in big-eye tuna.
日本水産學會の論文