1NQW:
reference: A structure-based model of the reaction catalyzed by lumazine synthase from Aquifex aeolicus., Zhang X, Meining W, Cushman M, Haase I, Fischer M, Bacher A, Ladenstein R, J Mol Biol 2003 Apr 18;328(1):167-82. PMID: 12684006

This OCA Structure page
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