Fig 2.

Schematic representation and comparison of the GT-42 loci of different Helicobacter species. Empty arrows represent the direction of transcription of the open reading frames within each locus. Black boxes correspond to the positions of simple sequence repeats (SSRs) of cytosine or guanine. Gray boxes indicate repeat regions of 8 to 15 units composed of six (KELERQ) or 10 (FKNIEEKLLE) amino acids. In parentheses are the dimensions of the GT-42 locus for each species. b, N-acetylneuraminic acid synthetase (neuB); c, UDP-N-acetylglucosamine-2-epimerase (neuC); a, CMP-sialic acid synthetase (neuA); s, sialyltransferase (with the corresponding phylogenetic group indicated).