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. 2009 Dec 18;192(4):925–935. doi: 10.1128/JB.01045-09

FIG. 1.

FIG. 1.

Genomic context of hupE and hupE2 genes in R. leguminosarum bv. viciae UPM791. (A) The hupE gene is part of the hupSLCDEF operon located in the symbiotic plasmid. Expression of hupE is controlled by the hydrogenase structural gene promoter. (B) The hupE2 gene is found in plasmid pRLUPM791b and bears an independent promoter. Black arrows highlight the positions of the hupE and hupE2 genes. Gray and hatched arrows show the hup and hyp genes, respectively. White arrows indicate genes adjacent to hupE2 unlinked to hydrogenase biosynthesis.