Fig. 2
From: Isolation and genetic characteristics of Novel H4N1 Avian Influenza viruses in ChongQing, China
Phylogenetic tree of HA (A), NA (B), PB2 (C), PB1 (D), PA (E), NP (F), MP (G) and NS (H). The sequences were aligned using the Muscle method. A phylogenetic tree was constructed using the neighbor-joining method, and the bootstrap values were determined through 1000 replications.The bootstrap value is represented by solid circles on the branching nodes. Different colors of the text represent different hosts, while different colors of the branches indicate different geographical locations of separation. The scale bar represents the distance unit between sequence pairs