Echinenone
Echinenone is a xanthophyll, with formula C40H54O. It is found in some cyanobacteria.[1] It is synthesized from β-carotene by the enzyme beta-carotene ketolase (or CrtW). It has also been isolated from sea urchins.[2]
References
- ^ E. H. Schwartzel and J. J. Cooney (October 1970). "Isolation and identification of echinenone from Micrococcus roseus". Journal of Bacteriology. 104 (1): 272–274. doi:10.1128/jb.104.1.272-274.1970. PMC 248210. PMID 5473895.
- ^ Lederer, E.; Moore, T. (1936). "Echinenone as a Provitamin A". Nature. 137 (3476): 996. Bibcode:1936Natur.137..996L. doi:10.1038/137996b0. ISSN 0028-0836.