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Intrasubunit nucleotide binding in ribonucleic acid polymerase.


ABSTRACT: 1. Periodate oxidation of the ribose ring was used to synthesize derivatives of nucleoside triphosphates. 2. These oxidized nucleoside triphosphates. 2. These oxidized nucleoside triphosphates are competitive inhibitors of RNA polymerase. 3. On incubation, together with NaBH4, these oxidized labelled nucleotides are covalently bound to Escherichia coli RNA polymerase. 4. Nucleoside triphosphate substrates decrease the extent of labelling. 5. A lysine residue in an alpha-subunit is labelled. 6. The significance of these results in relation to the location of the nucleotide-binding site is discussed.

SUBMITTER: Malcolm AD 

PROVIDER: S-EPMC1186053 | biostudies-other | 1978 Oct

REPOSITORIES: biostudies-other

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