FIG. 1.

B. anthracis map of the pXO2 (af188935) plasmid polymorphic loci. The origin and end (96231) of the plasmid are shown on the outer circle. The arrows show the two loci of pXO2 plasmid analyzed here. The corresponding PCR alias names are reported in brackets. All of the potential polymorphic loci are mapped with FINDPATTERN as described in Materials and Methods. The loci name are reported unabridged as indicated in a previous article (19). For convenience, the locations of the known virulent genes are mapped in the inner circle. Abbreviations: VX, variable number tandem repeats; IX, insertions; PS, single nucleotide polymorphism; pXO2, plasmid pXO2; -at, tandem repeats of dinucleotides AT; -A, single A repeats.