Tunaxanthin: occurrence and absolute stereochemistry

Carotenoids in the common- and golden form of rainbow trout, Oncorhynchus mykiss Walbaum

“…Czeczuga and Chelk.owski 1984), in both cases during spawning migrations. The other derivative of s-carotene-tunaxanthin, first isolated from a tuna Thunnus orientalis (Hirao et al 1957), forms at least three stereochemi.cal variations (R0nneberg et al 1978;Bingham et al 1979;Matsuno et al 1980b). Its occurrence in :fish was described by Bingham et al (1979).…”

“…The other derivative of s-carotene-tunaxanthin, first isolated from a tuna Thunnus orientalis (Hirao et al 1957), forms at least three stereochemi.cal variations (R0nneberg et al 1978;Bingham et al 1979;Matsuno et al 1980b). Its occurrence in :fish was described by Bingham et al (1979). In salmonids, tunaxanthin was identified in freshwater species Coregonus albula and Corego nus peled (Czeczuga 1977;D�browski et al 1987) and in some anadromic species of Pa cific salmon of the genus Oncorhynchus (Czeczuga 1979a;Matsuno et al 1980b;Miki et al 1982;Kitahara 1984a, b).…”

The occurrence of carotenoids in different-age individuals of Pelecus cultratus (L.) from the Vistula Lagoon

“…a-Carotene is transformed into lutein or its epoxy form both in plants and animals (Good win 1980). i,-Carotene and its derivatives-neothxantbin and tunaxanthin are common in freshwater fishes (Czeczuga 1979(Czeczuga , 1981 and in sea fishes (Bingham et al 1979). However, in the individuals examined, f3 -camtene and its derivatives prevail, mainly ketocarotenoids with astaxanthin constituting the majority.…”

Carotenoids in fish - XXXIX. Presence of salmoxanthin in Thymallus thymallus (L.) specimens

“…With respect to neothxanthin, it is a precursor of tunaxanthin, and is formed from e-carotene, the latter being rather rare in fishes. On the other hand, tunaxanthin is fairly frequent in fishes belonging to various systematic units (Bingham et al 1979).…”