Alignment of the amino acid sequences of FlgE hook proteins from different C. jejuni strains. 1, LIO 36 (isolate 5226 [sequence derived from the cloned flgE gene]); 2, LIO 36 (isolate 2772); 3, LIO 36 (isolate 9907); 4, LIO 4 (isolate 5231); 5, LIO 7 (isolate 5232); 6, C. coli. Identical amino acids are represented by dots. Dashes represent gaps introduced for optimal alignment. Boxed sequences indicate amino acids which are identical not only among C. jejuni strains but also to C. coli FlgE (16). Numbering of amino acids on the right refers to the cloned C. jejuni FlgE sequence.