Comparison of genomic locations of dhlB1 homologs in Xanthobacter strains EL1, EL4, EL8, GJ10, and Py2. The location of dhlB1 is highlighted with a blue star. A conserved 4-gene cluster, present in both EL4 and Py2, is boxed. The open reading frame color scheme is as follows: blue, metabolism; yellow, regulators; orange, transporters; light gray, hypothetical proteins; dark gray, transposases; maroon, integrase. Maps prepared in SnapGene.