4N8C:
reference: Structure of the extracellular domain of matrix protein 2 of influenza A virus in complex with a protective monoclonal antibody., Cho KJ, Schepens B, Seok JH, Kim S, Roose K, Lee JH, Gallardo R, Van Hamme E, Schymkowitz J, Rousseau F, Fiers W, Saelens X, Kim KH, J Virol. 2015 Apr;89(7):3700-11. doi: 10.1128/JVI.02576-14. Epub 2015 Jan 21. PMID: 25609808

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