1887

Abstract

SUMMARY: DNA from the yeast was studied for its heterogeneity and the multiplicity of rRNA cistrons. These cistrons banded at a slightly different density from the bulk DNA in preparative CsCl or Hg-CsSO equilibrium density gradients. The reassociation kinetics of the bulk DNA showed that the repetitive fraction represented a small amount of the total cellular DNA (10%) and that the single copy fraction had a complexity of 6·-3 × 10 daltons. Approximately 2·2% of the DNA hybridized to H-labelled rRNA at saturation. On the basis of the above genome size, the multiplicity of the rRNA cistrons was calculated to be about 70 per haploid nucleus.

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/content/journal/micro/10.1099/00221287-117-2-449
1980-04-01
2019-12-11
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http://instance.metastore.ingenta.com/content/journal/micro/10.1099/00221287-117-2-449
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