FIG. 1.

The six porB alleles found in ET-5 complex meningococci, compared to the sequence of allele porB3-1. The sequences have been edited such that invariant bases have been removed, leaving only the variable sites. The positions in the sequence alignments of the variable bases are indicated by the vertical numbers at the top of the figure. Where a sequence varies from the porB3-1 sequence in a given allele this is shown by the appropriate letter. A period indicates that the sequence is identical to that of allele 3-1 at that position. Single changes, which are likely to be the result of de novo point mutational events, are shown as white text on black.