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. 2003 Jun;69(6):3093–3102. doi: 10.1128/AEM.69.6.3093-3102.2003

FIG. 2.

FIG. 2.

Biosynthesis of speroidene and spirilloxanthin in photosynthetic bacteria. Rhodobacter sphaeroides and Rhodobacter capsulatus produce spheroidene (1, 14). In T. roseopersicina only spirilloxanthin can be detected, while in Rubrivivax gelatinosus both spheroidene and spirilloxanthin are synthesized (18).