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In this study, we expand on this observation by using current glyco\u2010analytical technologies to characterize these unknown groups. Capillary electrophoresis electrospray ionization MS and NMR analysis with a cryogenically cooled probe (cold probe) of CPS purified using a gentle enzymatic method revealed a hyaluronic acid\u2010type [\u20104)\u2010\u03b2\u2010<jats:sc>d<\/jats:sc>\u2010GlcA6NGro\u2010(1\u20133)\u2010\u03b2\u2010<jats:sc>d<\/jats:sc>\u2010GlcNAc\u2010(1\u2010]<jats:sub><jats:italic>n<\/jats:italic><\/jats:sub>repeating unit, where NGro is 2\u2010aminoglycerol. A labile \u03b1\u2010sorbofuranose branch located at C2 of GlcA was determined to have the<jats:sc>l<\/jats:sc>configuration using a novel pyranose oxidase assay and is the first report of this sugar in a bacterial glycan. A labile<jats:italic>O<\/jats:italic>\u2010methyl phosphoramidate group, CH<jats:sub>3<\/jats:sub>OP(O)(NH<jats:sub>2<\/jats:sub>)(OR) (MeO<jats:italic>P<\/jats:italic>N), was found at C4 of GlcNAc. Structural heterogeneity of the CPS was due to nonstoichiometric glycosylation with sorbose at C2 of GlcA and the nonstoichiometric, variably methylated phosphoramidate group. Examination of whole bacterial cells using high\u2010resolution magic angle spinning NMR revealed that the MeO<jats:italic>P<\/jats:italic>N group is a prominent feature on the cell surface for this serostrain. These results are reminiscent of those in the 11168 and HS:1 strains and suggest that decoration of CPS with nonstoichiometric elements such as keto sugars and the phosphoramidate is a common mechanism used by this bacterium to produce a structurally complex surface glycan from a limited number of genes. The findings of this work with the HS:19 serostrain now present a means to explore the role of CPS as a virulence factor in<jats:italic>C.\u2003jejuni<\/jats:italic>.<\/jats:p>","DOI":"10.1111\/j.1742-4658.2006.05401.x","type":"journal-article","created":{"date-parts":[[2006,8,1]],"date-time":"2006-08-01T17:25:14Z","timestamp":1154453114000},"page":"3975-3989","source":"Crossref","is-referenced-by-count":42,"title":["The HS:19 serostrain of<i>Campylobacter jejuni<\/i>has a hyaluronic acid\u2010type capsular polysaccharide with a nonstoichiometric sorbose branch and<i>O<\/i>\u2010methyl phosphoramidate group"],"prefix":"10.1111","volume":"273","author":[{"given":"David J.","family":"McNally","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Harold C.","family":"Jarrell","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nam H.","family":"Khieu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianjun","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Evgeny","family":"Vinogradov","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dennis M.","family":"Whitfield","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christine M.","family":"Szymanski","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jean\u2010Robert","family":"Brisson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2006,7,31]]},"reference":[{"key":"e_1_2_8_2_2","doi-asserted-by":"publisher","DOI":"10.3201\/eid0501.990104"},{"key":"e_1_2_8_3_2","doi-asserted-by":"publisher","DOI":"10.1086\/319760"},{"key":"e_1_2_8_4_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1432-1033.2002.03201.x"},{"key":"e_1_2_8_5_2","doi-asserted-by":"publisher","DOI":"10.1056\/NEJM199204233261706"},{"key":"e_1_2_8_6_2","doi-asserted-by":"publisher","DOI":"10.1021\/bi00167a033"},{"key":"e_1_2_8_7_2","doi-asserted-by":"publisher","DOI":"10.1021\/bi00167a032"},{"key":"e_1_2_8_8_2","doi-asserted-by":"publisher","DOI":"10.1128\/iai.62.5.2122-2125.1994"},{"key":"e_1_2_8_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/0022-510X(95)00045-4"},{"key":"e_1_2_8_10_2","doi-asserted-by":"publisher","DOI":"10.1212\/WNL.51.4.1110"},{"key":"e_1_2_8_11_2","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-59745-152-9_5"},{"key":"e_1_2_8_12_2","doi-asserted-by":"publisher","DOI":"10.1086\/499969"},{"key":"e_1_2_8_13_2","unstructured":"McDonaldAG(1993)Lipopolysaccharides fromCampylobacter.PhD Thesis York University North York Canada."},{"key":"e_1_2_8_14_2","doi-asserted-by":"publisher","DOI":"10.1093\/qjmed\/86.10.623"},{"key":"e_1_2_8_15_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF02019474"},{"key":"e_1_2_8_16_2","first-page":"968","article-title":"Serotype of Campylobacter jejuni, HLA, and the Guillain\u2013Barr\u00e9 syndrome","volume":"15","author":"Yuki N","year":"1992","journal-title":"Muscle Nerve"},{"key":"e_1_2_8_17_2","doi-asserted-by":"publisher","DOI":"10.1002\/ana.410330304"},{"key":"e_1_2_8_18_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2958.2000.01717.x"},{"key":"e_1_2_8_19_2","doi-asserted-by":"publisher","DOI":"10.1074\/jbc.M301273200"},{"key":"e_1_2_8_20_2","doi-asserted-by":"publisher","DOI":"10.1146\/annurev.micro.50.1.285"},{"key":"e_1_2_8_21_2","doi-asserted-by":"publisher","DOI":"10.1038\/35001088"},{"key":"e_1_2_8_22_2","doi-asserted-by":"publisher","DOI":"10.1128\/IAI.69.9.5921-5924.2001"},{"key":"e_1_2_8_23_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2958.2001.02431.x"},{"key":"e_1_2_8_24_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1742-4658.2005.04856.x"},{"key":"e_1_2_8_25_2","doi-asserted-by":"publisher","DOI":"10.1139\/V06-028"},{"key":"e_1_2_8_26_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2958.2004.04374.x"},{"key":"e_1_2_8_27_2","first-page":"88","article-title":"Bacterial lipopolysaccharide. 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