4HF5:
reference: A recurring motif for antibody recognition of the receptor-binding site of influenza hemagglutinin., Xu R, Krause JC, McBride R, Paulson JC, Crowe JE Jr, Wilson IA, Nat Struct Mol Biol. 2013 Mar;20(3):363-70. doi: 10.1038/nsmb.2500. Epub 2013 Feb, 10. PMID: 23396351

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).