FIG. 7.

Unrooted phylogenetic tree based on the ger operons of B. cereus ATCC 14579 (GenBank accession number AE016877) (1), B. cereus ATCC 10987 (AE017194) (2), B. cereus 569 (AAD03541 to AAD03543 [gerI], AAK70461 to AAK70463 [gerL], and AAK63174 to AAK63176 [gerQ]) (3), and B. anthracis Sterne (AE017225) (4) and the plasmid-located gerX sequence derived from the genome sequence of B. anthracis A2012 (AE016879) (5). The tree is based on the amino acid sequence of the A cistron of each operon. The A cistrons of these strains clustered in eight distinct groups. If the operon annotation for the strain is distinct from the group name, the strain annotation is noted.