FIG. 6.
Copper homeostatic genes of L. lactis. (A) Schematic representation of the copRZA operon and the copB gene. PcopR and PcopB indicate the promoter regions containing the cop boxes, and the arrows indicate the conjectured start of transcription. The genes are not drawn to scale. (B and C) Alignment of the N termini of CopA and CopB, respectively, of L. lactis (Ll) with the corresponding enzymes of E. hirae (Eh). Identical or similar amino acid residues are indicated in reverse colors; dissimilar residues are emphasized in gray.