title: Isoprenoid quinones of Campylobacter cryaerophila, C. cinaedi, C. fennelliae, C. hyointestinalis, C. pylori, and "C. upsaliensis".
abstract: The isoprenoid quinone contents of Campylobacter cryaerophila, C. cinaedi, C. fennelliae, C. hyointestinalis, C. pylori, and "C. upsaliensis" were determined by reverse-phase thin-layer and high-performance liquid chromatography. All six of these recently named Campylobacter species contained menaquinone-6 (MK-6), but only C. hyointestinalis and "C. upsaliensis" contained 2,[5 or 8]-dimethyl-3-farnesyl-farnesyl-1,4-naphthoquinone (*MK-6), a previously described novel menaquinone of the Campylobacter genus. C. cryaerophila, C. cinaedi, C. fennelliae, and C. pylori contained an unidentified quinone (Un-MK-6) with a molecular weight of 580 and a base peak ion of m/e = 225 by mass spectrometry but with chromatographic properties different from those of MK-6. *MK-6 and Un-MK-6 are important chemotaxonomic markers of Campylobacter and Campylobacter-like organisms.
authors.affiliation: Meningitis and Special Pathogens Branch, Centers for Disease Control, Atlanta, Georgia 30333.
authors.forename: C W
authors.initials: CW
authors.lastname: Moss
authors.forename: M A
authors.initials: MA
authors.lastname: Lambert-Fair
authors.forename: M A
authors.initials: MA
authors.lastname: Nicholson
authors.forename: G O
authors.initials: GO
authors.lastname: Guerrant
mesh_terms: D015415:Biomarkers; D002167:Campylobacter / Q000032:analysis* / Q000145:classification; D002851:Chromatography, High Pressure Liquid; D008970:Molecular Weight; D013045:Species Specificity; D014812:Vitamin K / Q000031:analogs & derivatives* / Q000032:analysis; D024482:Vitamin K 2 / Q000031:analogs & derivatives*
chemical_list: D015415:Biomarkers; D024482:Vitamin K 2; D014812:Vitamin K; C042455:menaquinone 6