(A) Alignment of ADI gene clusters. arcA, arginine deiminase; arcB, ornithine transcarbamylase; arcC, carbamate kinase; arcR, Crp/Fnr-type regulator; arcD, ornithine/arginine antiporter; arcT, noncharacterized transaminase; argR, arginine of the ArgR-AhrC family. The identities of a number of the genes indicated above remain putative (L. sakei [262, 263], E. faecalis [11], S. gordonii [78], S. pyogenes [74], S. suis [250], and O. oeni [228]). (B) Alignment of F1F0-ATPase operons (C) Alignment of of genes involved in regulation of sigB. (Panel B is based on data in reference 186; Panel C is based on data in reference 247.)