Comparison of sequences of CPS loci of C. jejuni strains. (A) Comparison of the sequences of the CPS loci of C. jejuni HS4/13/64 (strain GC8486) and the HS4 type strain; (B) comparison of the CPS loci of C. jejuni HS4/13/64 (strain GC8486), the HS10 type strain, and a strain of HS41 (strain 176.83) (17); (C) comparison of the CPS loci of C. jejuni HS4/13/64 (strain GC8486), the HS15 type strain, and an HS41 strain (strain 176.83); (D) comparison of the CPS loci of strains C. jejuni HS41 (strain 176.83) and the type strains of HS8, HS17, and HS42. Vertical bars represent identical regions between loci. The red bars correspond to regions that are oriented similarly, and blue bars indicate regions oriented in opposite directions. The outermost genes in red represent kpsC (left) and kpsF (right), two conserved genes in CPS synthesis that bracket the hypervariable CPS loci. The comparison was made using the Artemis comparison tool (ACT).