Table 1. Deduced amino acid sequences of the CVVI-49/2010 and CVVI-50/2014 strains relative to genetically related strains.

Strains	HA					NS					M1		PB2
	Cleavage site	Glycosylation site		Receptor binding site		Amino acids position				C-terminal	Amino acid position
	323–332	140–142	154–156	222	224	80–84	42	92	149		30	215	627	701
A/quail/Vietnam/CVVI-49/2010	REGRRKKR/G	KSS	NST	Q	G	Deletion	S	D	A	ESEV	D	A	E	D
A/quail/Vietnam/CVVI-50/2014	RERRRK—R/G	NSS	DNA	Q	G	Deletion	S	E	A	ESEV	D	A	E	D
A/goose/Guangdong/1/1996	RERRRKKR/G	RSS	NSA	Q	G	No deletion	A	D	A	ESEV	D	A	E	D
A/Dk/HK/821/02	IERRRKKR/G	KSS	NSA	Q	G	Deletion	S	D	A	ESEV	D	A	E	D
A/quail/Vietnam/36/2004	RERRRKKR/G	KSS	NST	Q	G	Deletion	S	D	A	ESEV	D	A	E	D
A/quail/Vietnam/177/2004	RERRRKKR/G	KSS	NST	Q	G	Deletion	S	D	A	ESEV	D	A	E	D
A/quail/Vietnam/TG-007B/2004	RERRRKKR/G	KSS	NST	Q	G	Deletion	S	D	A	EPEV	D	A	E	D
A/quail/Vietnam/15/2005	RERRRK—R/G	KSS	NDA	Q	G	Deletion	S	D	A	ESEV	D	A	E	D
A/quail/Vietnam/282/2005	RERRRKKR/G	KSS	NST	Q	G	Deletion	S	D	A	ESEV	D	A	E	D
A/Cambodia/R0405050/2007	REGRRKKR/G	KSS	NNS	Q	G	Deletion	S	D	A	ESEV	D	A	E	D
A/Cambodia/S1211394/2008	REGRRKKR/G	KSS	NST	Q	G	Deletion	S	D	A	ESEV	D	A	E	D
A/Hubei/1/2010	RERRRK—R/G	KSS	DNA	Q	G	Deletion	S	D	A	ESEV	D	A	E	D
A/Hong Kong/6841/2010	RERRRK—R/G	NSS	DNA	Q	G	Deletion	S	D	A	ESEV	D	A	E	D
A/barn swallow/HongKong/1161/2010	IERRRKKR/G	NSS	DNA	Q	G	Deletion	S	E	A	ESEV	D	A	E	D

*HA-Haemagglutinin, NS-Non-structural proteins, M1-Matrix protein M1, and PB2-Polymerase PB2. A-Alanine, D-Aspartic acid, E-Glutamic acid, G-Glycine, I-Isoleucine, K-Lysine, N-Asparagine, Q-Glutamine, R-Arginine, S-Serine, T-Threonine, V-Valine.