2DQE:
reference: Structural consequences of mutations in interfacial Tyr residues of a protein antigen-antibody complex. The case of HyHEL-10-HEL., Shiroishi M, Tsumoto K, Tanaka Y, Yokota A, Nakanishi T, Kondo H, Kumagai I, J Biol Chem. 2007 Mar 2;282(9):6783-91. Epub 2006 Dec 12. PMID: 17166830

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