Nucleotide sequences of 5S rRNAs from 11 coryneform bacteria were determined. These were the type strains of Corynebacterium glutamicum, Corynebacterium xerosis, Brevibacterium linens, Arthrobacter globiformis, Cellulomonas biazotea, Aureobacterium testaceum, Curtobacterium citreum, Pimelobacter simplex, and Caseobacter polymorphus and representative strains of "Corynebacterium aquaticum" and Corynebacterium xerosis. A phylogenetic tree constructed from the sequences of these bacteria and published sequences indicated that the coryneform bacteria consist of a distinct eubacterial branch together with Streptomyces and Micrococcus spp. These bacteria could be further divided into four subgroups.
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