Fig. 1From: The taxonomy, host range and pathogenicity of coronaviruses and other viruses in the Nidovirales orderPhylogenetic tree of RNA-dependent RNA polymerase (RdRp) amino acid sequences of 109 viral species in the Nidovirales order. The tree was constructed using the neighbor-joining method with a p-distance model and 1000 bootstraps in the MEGA V. 7.0.14Back to article page