1NPJ:
reference: Reconstitution of the type-1 active site of the H145G/A variants of nitrite reductase by ligand insertion., Wijma HJ, Boulanger MJ, Molon A, Fittipaldi M, Huber M, Murphy ME, Verbeet MP, Canters GW, Biochemistry 2003 Apr 15;42(14):4075-83. PMID: 12680761

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