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Reverse-phase liquid chromatography of the major carotenoids of Halorubrum sp. TBZ126. Column: 100-5 C18 column (300 by 4.6 mm, Knauer, Germany). Eluent: acetonitrile-dichloromethane-methanol (70:20:10, vol/vol/vol). Flow rate: 0.8 ml/min. Detection: 450 nm. Peak identities: peak 1, bacterioruberin; peak 2, all-trans lycopenes; peaks 3, 13-cis-lycopene; peak 4, all-trans- β-carotenes; peak 5, all-cis- β-carotenes.
