FIG. 6.

Comparison of the MarR amino acid sequence with the signature sequence of representative two-component response regulators. The two aspartates, one of which becomes phosphorylated, and the lysine that are highly conserved are shown in large bold type. The amino acids shown in smaller bold letters form part of a conserved hydrophobic core (35). MarR contains five charged amino acids in the hydrophobic core, as opposed to only two in CheB and none in the others. The numbers indicate the number of amino acids separating the listed amino acids.