Deoxyribonucleic Acid Homologies in the Genus Leuconostoc

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Abstract
Six deoxyribonucleic acid (DNA)-DNA homology groups within 45 strains of the genus Leuconostoc were distinguishable through DNA-DNA hybridizations with four 3H-labeled reference DNA preparations from type or reference strains of the various known named species. There is good correspondence between two of these DNA-DNA hybridization groups and the species L. lactis and L. paramesenteroides. Strains named L. mesenteroides are heterogeneous, comprising three different hybridization groups. One of these groups includes all the strains named L. dextranicum and L. cremoris. These results agree precisely with previous results from an immunological study of the two isofunctional enzymes, glucose-6-phosphate dehydrogenase (EC 1.1.1.49) and d-lactate dehydrogenase (EC 1.1.1.28), prepared from L. lactis NCDO 546 and L. mesenteroides NCDO 768 (ATCC 12291).

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