Table 1

*Indicates whether HA tested is wild type (wt) or a mutant.

†Presence (+) or absence (–) of an NX(T/S) glycosylation motif on Asn21. Glycosylation of this site is predicted to block CR8020 binding in group 1 HAs. The glycosylation site is absent from all group 2 HAs analyzed, including those tested above.