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Fine mapping of the ribosomal RNA genes of HeLa cell mitochondrial DNA

Authors
Journal
Journal of Molecular Biology
0022-2836
Publisher
Elsevier
Publication Date
Volume
138
Issue
2
Identifiers
DOI: 10.1016/0022-2836(80)90296-x

Abstract

Abstract A fine mapping study of the ribosomal RNA region of HeLa cell mitochondrial DNA has been carried out by using as an approach the protection by hybridized 12 S and 16 S rRNA of the complementary sequences in DNA against digestion with the single strand-specific Aspergillus nuclease S 1 or Escherichia coli exonuclease VII. No inserts have been detected in the main body of the 12 S and 16 S rRNA cistrons, in contrast to the situation described in the large mitochondrial ribosomal RNA gene of some strains of yeast and of Neurospora crassa. Furthermore, it has been possible to assign more precisely than previously the positions of the 5′ and 3′-ends of the 12 S rRNA and 16 S rRNA genes in the HpaII restriction map of HeLa cell mitochondrial DNA.

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