Figure 5.

Alignment of various mer operons mediating resistance to inorganic mercury and organomercurials located on plasmids and transposons. Genes displaying highest identities of their deduced amino acid sequences are indicated by bold arrows. Regulatory genes are shown in green, transfer genes in blue, enzyme genes in red and genes of unknown function in yellow. GenBank accession numbers of the respective nucleotide sequences are as follows: Pseudomonas sp. K62 pMR26 mer operon 1, D83080; pMR26 mer operon 2, AB013925; Pseudomonas sp. ED23-33 mer operon 2, Y17897; Serratia marcescens plasmid pDU1358, M24940 and M15049; Acinetobacter calcoaceticus plasmid pKLH2, L04303; Ralstonia sp. plasmid pMER610, Y08993; Tn21, AF071413.