Figure 4From: Differential stepwise evolution of SARS coronavirus functional proteins in different host speciesPhylogenetic relationships of 56 3'-end ORF sequences of SARS-CoVs from human and animals. The tree was generated with MrBayes 3.1.2 program. Posterior probabilities are shown on the nodes of the tree. Bar, 0.001 nucleotide substitutions per site.Back to article page