3NXF:
reference: Structural Analyses of Covalent Enzyme-Substrate Analog Complexes Reveal the Strengths and Limitations of De Novo Enzyme Design., Wang L, Althoff EA, Bolduc J, Jiang L, Moody J, Lassila JK, Giger L, Hilvert D, Stoddard B, Baker D, J Mol Biol. 2011 Nov 3. PMID: 22075445

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