Comparative analysis of the RV22 chromosomal fatDCBA gene cluster and genes of the pJM1 plasmid. The predicted open reading frames in RV22 showed levels of identity near 100% to different pJM1 regions corresponding to fatDCBA genes (DCBA), an uncharacterized putative ABC transporter gene (orf14) (labeled 14), and transposases (ISV), which have a different organization in RV22 and pJM1. In pJM1, fatDCBA form an operon (ITBO) together with the anguibactin biosynthesis genes angR and angT (11, 40) but not with the ABC transporter gene orf14. The open arrows indicate transposases in RV22 that are absent from pJM1. The light gray arrows indicate genes specific to one of the two molecules compared.