Skip to main content

Some NLM-NCBI services and products are experiencing heavy traffic, which may affect performance and availability. We apologize for the inconvenience and appreciate your patience. For assistance, please contact our Help Desk at info@ncbi.nlm.nih.gov.

Biochemical Journal logoLink to Biochemical Journal
. 1967 Oct;105(1):99–105. doi: 10.1042/bj1050099

The biosynthesis of cyclic carotenes

R J H Williams 1,*, G Britton 1,*, T W Goodwin 1,*
PMCID: PMC1198279  PMID: 6060456

Abstract

1. The incorporation of (3RS)-[2-14C,(4R)-4-3H1]mevalonic acid into various cyclic carotenes in the fruit of the tomato mutant delta has been studied. The results confirm our previous view that the α-ionone ring of α-carotene does not arise by isomerization of a β-ionone residue, and show that the same is also true for the α-ionone ring of δ- and ∈-carotene and α-zeacarotene. 2. The incorporation of (3RS)-[2-14C,2-3H2]mevalonic acid into α- and β-carotene in carrot roots has been studied. The results show that the β-ionone ring of β-carotene does not arise by isomerization of the α-ionone residue of α-carotene. 3. These experiments show that α- and β-ionone rings in cyclic carotenes are formed independently, probably by elimination of different protons from the same carbonium ion intermediates.

Full text

PDF
99

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. ANDERSON D. G., PORTER J. W. The biosynthesis of phytoene and other carotenes by enzymes of isolated higher plant plastids. Arch Biochem Biophys. 1962 Jun;97:509–519. doi: 10.1016/0003-9861(62)90115-7. [DOI] [PubMed] [Google Scholar]
  2. Williams R. J., Britton G., Charlton J. M., Goodwin T. W. The stereospecific biosynthesis of phytoene and polyunsaturated carotenes. Biochem J. 1967 Sep;104(3):767–777. doi: 10.1042/bj1040767. [DOI] [PMC free article] [PubMed] [Google Scholar]

Articles from Biochemical Journal are provided here courtesy of The Biochemical Society

RESOURCES