TABLE 1.

Molecular characteristics of the H7N9 viruses isolated from poultry and humans^a

H7N9 virus	HA (H3 numbering)			NA (N2 numbering)		M2	PB2
	Cleavage site	Residue 186	Residues 224–228	Residue 292	Stalk deletion	Residue 31	Residue 526	Residue 588	Residue 591	Residue 627	Residue 701
A/GD/Th008/2017	PKRKRTARG	V	NGQSG	K	69–73	N	K	V	Q	E	D
A/SZ/Th001/2016	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	K	D
A/SZ/Th002/2016	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	K	D
A/SZ/Th003/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
A/SZ/Th004/2017	PKG----RG	V	NGLSG	K	69–73	N	K	V	Q	E	D
A/GD/Th005/2017	PKGKRIARG	V	NGQSG	R	69–73	N	R	A	Q	K	D
A/SZ/Th006/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	K	D
A/SZ/Th007/2017	PKRKRTARG	V	NGQSG	K	69–73	N	K	V	Q	K	D
A/SZ/Th008/2017	PKRKRTARG	V	NGHSG	K	69–73	N	R	A	Q	E	N
A/FJ/QZ-Th001/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	K	D
A/FJ/QZ-Th002/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	K	D
A/FJ/QZ-Th005/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	K	D
A/YN/YN001/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	K	D
A/YN/YN002/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	K	D
CK/GD/SZBJ0011-O/2017	PKRKRTARG	V	NGQSG	K	69–73	N	K	V	Q	E	D
EN/GD/SZBA-E1/2017	PKGKRTARG	V	NGQSG	R	69–73	N	K	V	Q	K	D
CK/JS/KS001-O/2016	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
CK/JS/KS004-O/2016	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
CK/JS/KS008-O/2016	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
DK/JX/ShRSX002-O/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
EN/JX/ShRXZ038/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
CK/JX/ShRGF080-P/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
CK/JX/ShRGF219-O/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
CK/ZJ/HZ142/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
CK/ZJ/HZ293/2016	PKG----RG	V	NGLSG	R	69–73	N	K	I	Q	E	D
CK/ZJ/HZ298/2016	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
CK/GD/DGCPLB032/2016	PKG----RG	V	NGQSG	R	69–73	N	K	V	Q	E	D
CK/LN/LN-083/2017	PKG----RG	V	NGLSG	R	69–73	N	R	A	Q	E	D
CK/SD/QD2-758/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
CK/SD/QD4-739/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
CK/SD/DZ056/2017	PKRKRTARG	V	NGQSG	R	69–73	N	R	A	Q	E	D
CK/LN/SY059/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
CK/HB/XT001/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
CK/JS/DT001/2017	PKG----RG	V	NGLSG	R	69–73	N	K	V	Q	E	D
CK/FJ/NP001/2017	PKRKRTARG	V	NGQSG	R	69–73	N	R	A	Q	E	D

^aA total of 35 H7N9 viruses were isolated and sequenced in the present study. CK, chicken; DK, duck; EN, environment; FJ, Fujian; GD, Guangdong; HB, Hebei; JS, Jiangsu; JX, Jiangxi; LN, Liaoning; SD, Shandong; SZ, Shenzhen; YN, Yunnan; ZJ, Zhenjiang.