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Genetic map of the region encompassing the yiaK-S operon (A) and the yjfR-X regulon (B). Arrows indicate the extent and direction of transcription of the genes. The genes encoding the sets of paralog proteins YiaR/YjfW and YiaS/YjfX are indicated in black, and the genes identified in this study as belonging to the ula regulon are indicated in grey.
