FIGURE 4.
Mercury resistant gene determinants identified within the genome of Arthrobacter sp. strain H-02-3 relative to other bacteria. Shown are (A), the mercuric ion reductase (EC 1.16.1.1) (merA). (B), the organomercurial lyase (EC 4.99.1.2) (merB) and (C), a mercuric resistance operon regulatory protein. The graphic is centered on the focus gene, which is red and numbered 1. Sets of genes with similar sequence are grouped with the same number and color. Genes whose relative position is conserved in at least eight other species are functionally coupled and share gray background boxes. The focus gene always points to the right, even if it is located on the minus strand.