Fig. 2. Analysis of close viral relationships of each gene from the three isolates in this study and their nucleotide homology. The colors represent the different nucleotide homology with each gene of the closest virus. The nucleotide homology in the same lineage between the isolates in this study and chosen H7N9 viruses. Eight gene segments in each of the schematic virus particles are arranged from top to bottom to represent polymerase basic 2 (PB2), polymerase basic 1 (PB1), polymerase acidic (PA), hemagglutinin (HA), nucleoprotein (NP), neuraminidase (NA), matrix (M), and nonstructural (NS) genes, and are indicated in same color with representative viruses for each lineage. The red indicates SH/F/98 lineage; the green indicates HK/G1/97 lineage; the yellow indicates ST/163/04 lineage; the blue indicates an undefined lineage, and the gray indicates another lineage.