2XA3:
reference: Crystal Structure of the Neutralizing Llama V(HH) D7 and Its Mode of HIV-1 gp120 Interaction., Hinz A, Lutje Hulsik D, Forsman A, Koh WW, Belrhali H, Gorlani A, de Haard H, Weiss RA, Verrips T, Weissenhorn W, PLoS One. 2010 May 5;5(5):e10482. PMID: 20463957

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