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Schematic depiction of the fbfA-fbfB region of the S. aurantiaca wild-type (WT) strain DW4/3-1 and of the strains BS34 and BS35. BS34 has two truncated fbfB genes: one is shortened at its 5′ end and the other is fused at its 3′ end with the Rhodobacter pufBA fragment and the neo gene. BS35 has a wild-type fbfB gene and a Δtrp-lacZ-fbfB fusion gene, which is under the control of the fbfB promoter. E, EcoRI; S, SalI; Sm, SmaI.
