Some features of deoxyribonucleic acid (DNA) from 41 strains from Zaïrese palm wines, Mexican pulque, and English beer and cider were determined. DNA base composition varies within the narrow range of 47.5 to 49.5 mol% guanine plus cytosine. DNA:DNA hybridizations in stringent conditions show high nucleotide sequence similarities of over 76% DNA duplexing (% D), but mostly over 90% D. There is one slightly aberrant strain with less than 32% D. The molecular weight of the genome is 1.5 x 10. and have almost identical genomes. Our data do not support species differentiation.


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