Table 2.

Molecular characterization of surface genes of the ostrich’s H9N2 strains.

Virus	HAa									NA
	Cleavage site	Receptor binding site						Other sides		Hemadsorbing site		Deletion
		S138A	I155T	T160A	H183N	A190V	Q226L	372	220–223	366–373aa	399–404aa	in the stalk
O/BJ/712/13	RSSR↓GLF	A	T	A	N	T	L	K	RPLV	IKSDSRSG	DSDSWS	63–65
O/HB/28/13	RSSR↓GLF	A	T	A	N	A	L	K	RPLV	IKDDSRSG	DSDNWS	63–65
O/BJ/142/13	RSSR↓GLF	A	T	A	N	T	L	K	RPLV	IKSDSRSG	DSDSWS	63–65
O/BJ/293/13	RSSR↓GLF	A	T	A	N	V	L	K	RPLV	IRSDSRSG	DSDSWS	63–65
O/HB/179/14	RSSR↓GLF	A	T	D	N	K	L	K	RPLV	IKNGSRSX	DSDDWS	63–65
O/HB/182/14	RSSR↓GLF	A	T	D	N	T	L	K	RPLV	IRNNSRSG	DSENWS	63–65
O/YN/438/14	RSSR↓GLF	A	T	A	N	V	L	K	—b	IRNDSRSG	DSENWS	63–65
D/HK/Y280/97	RSSR↓GLF	A	T	A	N	T	L	R	RPLV	IKEDSRSG	DSDNWS	63–65
O/Eshkol/1436/03	RSKR↓GLF	A	T	S	H	E	L	K	RPLV	IKKDSRAG	DSDNLS	—
O/RSA/9508103/95	ASYR↓GLF	A	T	S	H	E	Q	E	RPLV	ISKDSRSG	DNNNWS	—

^aH3 numbering.

^b“—” denotes deletion.