1TI7:
reference: The negative transcriptional regulator NmrA discriminates between oxidized and reduced dinucleotides., Lamb HK, Leslie K, Dodds AL, Nutley M, Cooper A, Johnson C, Thompson P, Stammers DK, Hawkins AR, J Biol Chem. 2003 Aug 22;278(34):32107-14. Epub 2003 May 22. PMID: 12764138

This OCA Structure page
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