Abstract
It has been reported that the 16-S and 23-S components of Escherichia coli ribosomal RNA compete for common hybridization sites on homologous DNA. We here show that no such competition phenomenon occurs. Carefully purified preparations of the two major ribosomal RNA types do not competitively interact with one another during hybridization to Escherichia coli DNA. Consequently, as in all other organisms tested to date, genes coding for molecules of 23-S ribosomal RNA are entirely distinct from those giving rise to 16-S ribosomal RNA molecules. We also confirm that there are multiple gene copies responsible for the biogenesis of each ribosomal RNA component in Escherichia coli.
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