Carotenoids and related compounds. Part XXIII. Occurrence of 7,8,11,12-tetrahydrolycopene, spheroidene, 3,4,11′,12′-tetrahydrospheroidene, and 11′,12′-dihydrospheroidene in Rhodospirillum rubrum
- 1 January 1969
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society C: Organic
- No. 9,p. 1266-1268
- https://doi.org/10.1039/j39690001266
Abstract
Four carotenoids isolated from diphenylamine-inhibited cultures of Rhodospirillum rubrum have been identified by light absorption spectroscopy and mass spectrometry as 7,8,11,12-tetrahydrolycopene (IV), spheroidene (IX), 3,4,11′,12′-tetrahydrospheroidene (VII), and 11′,12′-dihydrospheroidene (XII). The recognition of 7,8,11,12-tetrahydrolycopene (IV) suggests the need for a modification of the Porter-Lincoln series in these photosynthetic bacteria, and the presence of the other three pigments indicates that alternative pathways of spirilloxanthin biosynthesis may be operating.Keywords
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