FIG. 3.

Distribution of strain-specific sequences. Distribution along the chromosome of Z2491 of amplicons absent from each of the strains of N. meningitidis (A) and from each of the strains of N. gonorrhoeae and N. lactamica (B). The strains are arranged as in Table 1 and Fig. 2. The peak height represents the difference between the value for an amplicon and the cutoff value, where the sequence is absent from the strain. Only groups of at least two contiguous nonreacting amplicons are shown. Selected genes or groups of genes, meningococcus serogroup A specific (A) and meningococcus specific (B), are named. Strain Z5463 (A) is an isolate from the same epidemic as the reference strain, Z2491, and bears witness to their high sequence homology.