Comparison of nucleotide and amino acid identities of the genes of the C. baratii type F7 orfX cluster to the genes of the C. botulinum types A, E, and F orfX clusters.

NA, not available in GenBank.Note that even the most similar homologous genes were approximately 15% different (nucleotides) and 25% different (amino acids). Also, the most dissimilar homologous genes were approximately 60%–80% different (nucleotides) and 43%–75% different (amino acids). Only one representative of the several known bont/E gene clusters (bont/E3 of strain Alaska E43) was included in Table 1 because the bont/E subtype gene cluster sequences are conserved. Both Alaska E43 and IBCA66-5463 are nonproteolytic (Group II), while the other strains in the Table are proteolytic (Group I).