Phylogenetic Relationships of Three Porcine Mycoplasmas, , and , and Complete 16S rRNA Sequence of Free

Abstract

The nucleotide sequence of the 16S rRNA gene of was determined and was compared with the sequence of a related porcine mycoplasma, . While the overall level of DNA-DNA homology was approximately 11%, sequence alignment of the two 16S rRNA genes yielded a homology value of more than 95%, emphasizing the highly conserved nature of the 16S rRNA gene. Multiple sequence alignments with other mollicutes indicated that , and form a subcluster within the fermentans phylogroup, and this subcluster is distinct from the phylogroup. Thus, the three mycoplasmas isolated from porcine respiratory systems exhibit phylogenetic similarities.

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1992-04-01
2024-03-28
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