Bleomycin-induced breakage of closed-circular DNA

James C. Bearden, R. Stephen Lloyd, Charles W. Haidle

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


The amount of breakage induced by bleomycin in closed-circular DNA from bacteriophage PM2 was investigated under various reaction conditions. Analysis of the extent of breakage, by alkaline band centrifugation and agarose gel electrophoresis, yielded quite different results from those previously reported for the breakage of closed-circular SV40 DNA by bleomycin. Compared to these earlier results, we found (a) the reaction required the addition of 2-mercaptoethanol; and (b) the breakage reaction was further stimulated by the addition of 2-mercaptoethanol in the absence of EDTA.

Original languageEnglish (US)
Pages (from-to)442-448
Number of pages7
JournalBiochemical and Biophysical Research Communications
Issue number2
StatePublished - Mar 21 1977
Externally publishedYes

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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