Figure 2

The phylogeny of gammacoronavirus spike and nucleocapsid proteins. A maximum likelihood tree built, using the amino acid sequences of the spike protein (a) and nucleocapsid protein (b) domains aligned with ClustalW31, in MEGA X using the Jones-Taylor-Thornton (JTT) substitution model and 1000 bootstraps32. IBV Infectious Bronchitis virus, TCoV Turkey Coronavavirus, PCoV Pigeon Coronavirus, DCoV Duck Coronavirus.