The genome sequence of the food-borne pathogen Campylobacter jejuni reveals hypervariable sequences.
Parkhill J, Wren BW, Mungall K, Ketley JM, Churcher C, Basham D, Chillingworth T, Davies RM, Feltwell T, Holroyd S, et al. Nature. 2000 Feb 10; 403(6770):665-8.