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Table 5 List of mutations of the genes other than HA in progeny strains

From: Effect of the selection pressure of vaccine antibodies on evolution of H9N2 avian influenza virus in chickens

Gen Tissue Immunized Nonimmunized
NA Trachea Amino acids 67–76 deletion (20/20)
Lung Amino acids 67–76 deletion (24/24)
PB2 Trachea D256N (1/20), R318K (13/20), R355K (20/20) R318K (19/19)
Lung R318K (19/24), R355K (24/24), K526R (1/24), A622V (2/24) I63M (1/15), R318K (15/15)
PB1 Trachea I397V (1/20) I517V (1/19)
Lung
PA Trachea R185K (1/19), S190F (1/19), E533G (1/19), F646S (1/19), C693G (1/19)
Lung F46L (1/24), V127I (1/24), L132I (1/24), E319V (1/24) V554I (1/15)
NP Trachea V186I (19/19), L466I (9/19)
Lung V186I (15/15), L466I (14/15)
NS Trachea L33Q (1/19), L77I (19/19)
Lung P85L (1/24) L77I (15/15), V84M (1/15)
M1 Trachea L28P (1/20) F62L (2/19), R256H (1/19)
Lung
M2 Trachea
Lung R304G (2/24) A209T (1/15)