FIG. 2.

Alignment of UreI amino acid sequences from H. hepaticus MU94-1 and H. pylori. Identical residues are depicted by “|.” Similar residues are depicted with “:” or “.” Transmembrane helices and periplasmic loops are shown as determined by Weeks et al. (55) for H. pylori UreI. Helices are enclosed in solid boxes. Solid bars indicate periplasmic loops. Peptides used by Scott et al. (42) to develop anti-UreI antibodies are enclosed in dashed boxes. The arrowhead points to histidine 123 of H. pylori UreI.