FIG. 1.

Alignment of seven meningococcal PorB protein sequences obtained by translation of the nucleotide sequences of each of the porB alleles identified among serotype 22 meningococci. The locations of the putative surface loops (I to VIII) of the porin are indicated. The boxed area defines the putative surface loop VI that is likely to be important for recognition of the PorB proteins by the serotype 22 MAb. Sequences AF065126 and U92906 were different at the nucleotide sequence level but possessed identical peptide sequences.