Fig 1.

Gene organization and natural deletion of the elrA operon in E. faecalis isolates. (A) Schematic representation of the chromosomal region of the elrA operon. Putative rho-independent transcriptional terminators are indicated as lollipops. The promoter region of the elrA operon is represented by a black-headed arrow. (B) Schematic representation of the predicted ElrR product. HTH indicates the helix-turn-helix domain. G, R, and Y indicate glycine, arginine, and tyrosine residues, respectively. Numbers refer to the amino acid positions in ElrR.