Base Composition of Deoxyribonucleic Acid of the Temperature-Sensitive Kanamycin-Resistant R Factor, R ts 1
- 1 March 1970
- journal article
- research article
- Published by American Society for Microbiology in Journal of Bacteriology
- Vol. 101 (3), 856-859
- https://doi.org/10.1128/jb.101.3.856-859.1970
Abstract
The buoyant density of deoxyribonucleic acid (DNA) from the temperature-sensitive R factor, R ts 1, was determined by CsCl density-gradient centrifugation. R ts 1 was found to consist of a single species of DNA of density 1.705 g/cm 3 , which corresponds to a base composition of 45% guanine plus cytosine. This value is distinct from the densities previously reported for other R factors, suggesting that R ts 1 represents a new molecular class of R factors.Keywords
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