1U6A:
reference: Structure of the Fab fragment of F105, a broadly reactive anti-human immunodeficiency virus (HIV) antibody that recognizes the CD4 binding site of HIV type 1 gp120., Wilkinson RA, Piscitelli C, Teintze M, Cavacini LA, Posner MR, Lawrence CM, J Virol. 2005 Oct;79(20):13060-9. PMID: 16189008

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