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Nucleic Acids Research, 1981, Vol. 9, No. 12 2717-2725
© 1981

MOLECULAR BIOLOGY

16S Ribosomal RNA of Escherichia coll contains a N2-methylguanosine at 27 nucleotides from the 3' end

Rein Van Charldorp, Hans A. Heus and Peter H. Van Knippenberg

Department of Biochemistry, State University of Leiden P.O.Box 9505, 2300 RA Leiden, The Netherlands

Received April 24, 1981. The 49 nucleotide fragment derived from the 3' end of 16S rRNA by cloacin DF13, is not cleaved by ribonuclease T1 at a guanosine residue that is present at 27 nucleotides from the 3' terminus (position 1515 in 16S rRNA). Analysis of the isolated nucleotide indicates that it is a modified G residue. In vivo labeling with (3H)methionine shows that this G is methylated and co-chromatography with markers reveals that it is N2-methylguanosine.


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