4NIK:
reference: Restricted diversity of antigen binding residues of antibodies revealed by computational alanine scanning of 227 antibody-antigen complexes., Robin G, Sato Y, Desplancq D, Rochel N, Weiss E, Martineau P, J Mol Biol. 2014 Aug 28. pii: S0022-2836(14)00456-2. doi:, 10.1016/j.jmb.2014.08.013. PMID: 25174334

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