1887

Abstract

Abstract

The deoxyribonucleic acids (DNA) of ATCC 10953 and ATCC 23726 were submitted to DNA-DNA hybridization procedures. A polynucleotide homology of 78% was demonstrated, indicating that the recent grouping of all oral strains into one species, should be reevaluated. The polynucleotide homology between ATCC 19616 and the two strains of tested was less than 30%. The guanine plus cytosine (G+C) values of the DNA and strains tested were similar and unusually low (24.5 to 25.6 mol%). Since bacteria of the family reportedly have G+C values of 41 to 42 mol%, the placing of the genera and into this family is questionable. The similar unusually low G+C values of the DNA of and may indicate a close phylogenetic relationship for these genera.

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1976-07-01
2024-10-03
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