4RQQ:
reference: Recombinant HIV envelope trimer selects for quaternary-dependent antibodies targeting the trimer apex., Sok D, van Gils MJ, Pauthner M, Julien JP, Saye-Francisco KL, Hsueh J, Briney B, Lee JH, Le KM, Lee PS, Hua Y, Seaman MS, Moore JP, Ward AB, Wilson IA, Sanders RW, Burton DR, Proc Natl Acad Sci U S A. 2014 Nov 24. pii: 201415789. PMID: 25422458

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