2A0J:
reference: Crystal structure of nitrogen regulatory protein IIANtr from Neisseria meningitidis., Ren J, Sainsbury S, Berrow NS, Alderton D, Nettleship JE, Stammers DK, Saunders NJ, Owens RJ, BMC Struct Biol 2005 Aug 10;5:13. PMID: 16092953

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