Figure 4.
The phylogenetic tree and the protein structure of bird type I IFN receptors. (a) The phylogenetic tree of type I IFN receptors. It was built by MEGA5 program with 1000 bootstrap replicates and based on the neighbor-joining method. Blue, orange, green, pink in the picture represent mammals, birds, reptiles and amphibians, fish, respectively; and (b) The structure of bird type I IFN receptors. IFNAR1 reference sequences: Gallus gallus [GenBank: AAU85361.1], Ficedula albicollis [GenBank: XP005037152.1], Taeniopygia guttata [GenBank: XP002189268.1], Homo sapiens [GenBank: NP000620.2], Mus musculus [GenBank: AAH43935.1], Alligator mississippiensis [GenBank: XP006259500.1], Oncorhynchus mykiss [GenBank: NP001117887.1]. IFNAR2 reference sequences: Gallus gallus [GenBank: AAD13677.1], Columba livia [GenBank: XP005511439.1], Ficedula albicollis [GenBank: XP005037150.1], Sus scrofa [GenBank: NP001191704.2], Chrysemys picta bellii [GenBank: XP005283981.1], Alligator mississippiensis [GenBank: XP006259497.1].