4NUG:
reference: Structural Delineation of a Quaternary, Cleavage-Dependent Epitope at the gp41-gp120 Interface on Intact HIV-1 Env Trimers., Blattner C, Lee JH, Sliepen K, Derking R, Falkowska E, de la Pena AT, Cupo A, Julien JP, van Gils M, Lee PS, Peng W, Paulson JC, Poignard P, Burton DR, Moore JP, Sanders RW, Wilson IA, Ward AB, Immunity. 2014 Apr 22. pii: S1074-7613(14)00122-8. doi:, 10.1016/j.immuni.2014.04.008. PMID: 24768348

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