TABLE 4.

Amino acid substitutions identified in mouse-adapted H1N1 influenza viruses

H1N1 virusAmino acid residue at position no.
PB2 158PA 295HANP
119155183221222101289
A/CA/04/09EPKGSRDDH
A/CA/04/09-MA1GPKEPRGGH
A/CA/04/09-MA2EPKEPRGGH
A/TN/1-560/09ELKGSRDDH
A/TN/1-560/09-MA1APNaGSKDDY
A/TN/1-560/09-MA2EPKGSKDDY
  • a The underlined letter indicates the N-glycosylation site.