Stereochemical configuration and provitamin A activity. 5. Neocryptoxanthin A

Deuel, H.J., J.; Meserve, E.R.; Sandoval, A.; Zechmeister, L.

Archives of Biochemistry 10: 491-496


ISSN/ISBN: 0096-9621
Accession: 013837389

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Cryptoxanthin prepared from the persimmon, Diospyros kaki, was isomerised by catalysis with iodine and exposure to visible light. Neo-cryptoxanthin A, separated by chromatography, was found in biological tests to have 42 per cent. of the activity of all-trans- beta -carotene. This activity corresponded to 71 per cent. of that of cryptoxanthin which, according to previous workers, has 58 per cent. of the activity of beta -carotene. T. Moore.