1QFU:
reference: A complex of influenza hemagglutinin with a neutralizing antibody that binds outside the virus receptor binding site., Fleury D, Barrere B, Bizebard T, Daniels RS, Skehel JJ, Knossow M, Nat Struct Biol. 1999 Jun;6(6):530-4. PMID: 10360354

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