4EVN:
reference: Structural and genetic basis for development of broadly neutralizing influenza antibodies., Lingwood D, McTamney PM, Yassine HM, Whittle JR, Guo X, Boyington JC, Wei CJ, Nabel GJ, Nature. 2012 Sep 27;489(7417):566-70. doi: 10.1038/nature11371. Epub 2012 Aug 29. PMID: 22932267

This OCA Structure page
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