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The carotenoids of Staphylococcus aureus 209P have been identified as triterpenoid (C30) carotenoids. The pigments include members of a carotene dehydrogenation sequence with C30 analogs of phytoene, phytofluene, zeta-carotene, and neurosporene. The major xanthophyll present under the cultural conditions used is a carotenoic acid derived from the C30 analog(More)
Detailed studies of the properties of carotenoids isolated from diphenylamine-inhibited cultures of Rhodospirillum rubrum have revealed a number of novel structures that indicate new features of carotenoid biosynthesis in the photosynthetic bacteria. Both neurosporene and 7,8,11,12-tetrahydrolycopene undergo hydration, methylation and dehydrogenation to(More)
  • B H Davies
  • Pure and applied chemistry. Chimie pure et…
  • 1969
Detailed studies of the properties of carotenoids isolated from diphenylamine-inhibited cultures of Rhodospirillum rubrum have revealed a number of novel structures which indicate new features of carotenoid biosynthesis in the photosynthetic bacteria. The dehydrogenation of phytoene to coloured carotenoids occurs by a sequence which is different from that(More)
1. The characterization of two novel triterpenoid xanthophylls occurring in Streptococcus faecium UNH 564P is described. 2. Both are derived formally, and probably biosynthetically, from the C(30) analogue of neurosporene and have been identified as 4-hydroxy-4,4'-diaponeurosporene and its glucoside, 4-d-glucopyranosyloxy-4,4'-diaponeurosporene. 3. Problems(More)
The retention behaviour of over seventy terpenoids on three silicone polymer liquid phases under both isothermal and temperature-programmed conditions is reported. Terpenoids with conjugated unsaturation (e.g., carotenoids) were hydrogenated prior to analysis in order to prevent thermal decomposition. Analyses of the acetates and TMS ethers of both the(More)
Differences between the absorption spectra of zeta-carotene (7,8,7',8'-tetrahydrolycopene) and the corresponding conjugated heptaene from diphenylamine-inhibited cultures of Rhodospirillum rubrum have been rationalized by the identification of the latter compound as the unsymmetrical isomer, 7,8,11,12-tetrahydrolycopene. The structures of the other(More)
  • B H Davies
  • Pure and applied chemistry. Chimie pure et…
  • 1973
Studies on Neurospora crassa and mutants of Phycomyces blakesleeanus have led to a reappraisal of a number of important aspects of carotene biosynthesis. Results obtained from structural investigations, from inhibitor studies and from the use of labelled substrates with carotenogenic extracts of fungal mutants are discussed in the contexts of the(More)
1. The occurrence of a novel series of triterpenoid carotenes in Streptococcus faecium UNH 564P is reported. 2. This series, which comprises the C(30) analogues of phytoene, phytofluene, zeta-carotene, 7,8,11,12-tetrahydrolycopene and neurosporene, appears to be analogous to the C(40) Porter-Lincoln series and a pathway of triterpenoid carotene(More)
1. The identification of two novel triterpenoid xanthophylls from Streptococcus faecium UNH 564P is described. 2. Both are aldehydes and were identified as 4,4'-diaponeurosporen-4-al and 4,4'-diapolycopen-4-al. 3. A pathway is presented for the biosynthesis of these and other triterpenoid carotenoids in S. faecium.