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. 1979;6(5):1775–1790. doi: 10.1093/nar/6.5.1775

Max-Planck-Institut für Molekulare Genetik, Abteilung Wittmann, Berlin-Dahlem, GFR.

C Zwieb, R Brimacombe
PMCID: PMC327810  PMID: 377231

Abstract

It is well established that when E. coli 30S ribosomal subunits are irradiated with ultraviolet light under mild conditions a specific cross-link is formed between protein S7 and the 16S RNA. Methodology is presented for the analysis of the single nucleotide residue concerned in this cross-link. Firstly, the identity of the ribonuclease T1 octanucleotide attached to S7 is confirmed by a new method, which involves isolation and analysis of S7-polynucleotide complexes containing 30 -- 40 nucleotides. Secondly, the isolated S7-octanucleotide complex is digested successively with ribonuclease A, proteinase K and ribonuclease T2, and the nucleotides liberated are identified. The results show unambiguously that uridine residue number 1239 in the 16S RNA sequence is cross-linked to protein S7.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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