5FGC:
reference: Antibody response to the hypervariable region-1 interferes with broadly neutralizing antibodies to hepatitis C virus., Keck ZY, Girard-Blanc C, Wang W, Lau P, Zuiani A, Rey FA, Krey T, Diamond MS, Foung SK, J Virol. 2016 Jan 6. pii: JVI.02458-15. PMID: 26739044

This OCA Structure page
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