McNally DJ, Jarrell HC, Khieu NH, Li J, Vinogradov E, Whitfield DM, Szymanski CM, Brisson JR. The HS:19 serostrain of Campylobacter jejuni has a hyaluronic acid-type capsular polysaccharide with a nonstoichiometric sorbose branch and O-methyl phosphoramidate group. FEBS J. 2006 Sep; 273(17):3975-89.