Guanine Plus Cytosine Content of the Deoxyribonucleic Acid of the Leuconostocs and Some Heterofermentative Lactobacilli Free

Abstract

The mole percent guanine plus cytosine in the deoxyribonucleic acid of 12 strains (6 species) of and 9 strains (4 species) of slime-forming heterofermentative lactobacilli has been determined. Calculated from melting-temperature curves, the values were in the range 40 to 47%, but calculated from buoyant-density determinations they were 2 to 4% lower. The melting temperature of the reference deoxyribonucleic acid from K-12 was 0.7 to 1 degree higher than the expected figure of 90.6 C. This point is discussed.

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1974-04-01
2024-03-29
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