Base composition of deoxyribonucleic acid of the temperature-sensitive kanamycin-resistant R factor, Rts1.
J Bacteriol 1970;
101:856-9. [PMID:
4908784 PMCID:
PMC250402 DOI:
10.1128/jb.101.3.856-859.1970]
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Abstract
The buoyant density of deoxyribonucleic acid (DNA) from the temperature-sensitive R factor, Rts1, was determined by CsCl density-gradient centrifugation. Rts1 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 Rts1 represents a new molecular class of R factors.
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