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A. Location of the four structural hydrogenase operons on the E. coli K12 chromosome (AC000091) (Hayashi et al., 2006). The values in brackets signify the locations of the respective genes on the genome map. B. Organization of the genes of each hydrogenase operon in E. coli.Arrows indicate the direction of transcription. For details for each gene see Table 1 (Hayashi et al., 2006).
