title: Characteristics of the yellow pigment from a strain of Yersinia enterocolitica biovar 1.
abstract: Yersinia enterocolitica 195A14J, a milk-isolated strain of biovar 1, produces a non-diffusible yellow pigment and forms star-shaped colonies when grown on egg-yolk agar at 28 degrees C. Solubility properties and in situ Raman spectrum of the pigment support evidence that it is not a carotenoid, although it contains a 9 (+/- 1) double-bond polyenic chain. Pigmentless variants, also star-shaped, appeared with a frequency of ca.10(-3) when bacteria were grown at 38 degrees C. Agarose gel electrophoresis of DNA extracted from the pigmented strain revealed the presence of a 42-kb plasmid which was lost in pigmentless variants.
authors.affiliation: Laboratoire de Bactériologie, Université Louis Pasteur, Faculté de Pharmacie, Strasbourg, France.
authors.forename: D J
authors.initials: DJ
authors.lastname: Vidon
authors.forename: C
authors.initials: C
authors.lastname: Delmas
authors.forename: J C
authors.initials: JC
authors.lastname: Merlin
mesh_terms: D004269:DNA, Bacterial / Q000032:analysis; D004587:Electrophoresis, Agar Gel; D010957:Plasmids; D011090:Polyenes / Q000032:analysis* / Q000302:isolation & purification; D012995:Solubility; D013053:Spectrophotometry; D013059:Spectrum Analysis, Raman; D015008:Yersinia enterocolitica / Q000032:analysis* / Q000166:cytology
chemical_list: D004269:DNA, Bacterial; D011090:Polyenes; C056686:yellow pigment (Yersinia enterocolitica)