Address reprint requests to: Dr. M. J. Cauthier, Centre d'Etudes et de Recherches de Biologie et d'oceanographie Medicale-1, Avenue Jean Lorrain, 06300, Nice, France.
Three strains of marine bacteria that produce a lemon-yellow, non-carotenoid pigment and a polyanionic antibiotic substance have been investigated from phenotypic and genetic standpoints. Their phenotypic characters, together with the low guanine-plus-cytosine contents of their deoxyribonucleic acids, place these strains in the genus Alteromonas Baumann et al. The main features of these strains are sufficiently different from those of the alteromonads previously described to justify placing them in a new species, for which the name Alteromonas citrea is proposed. The type strain is strain no. 10 (=NCMB 1889).
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