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Divergence dates of coronavirus lineages represented on a phylogenetic tree generated based on 1,797 nucleotides of the complete HEL domain sequence. Breda virus (AY427798) was used to root the tree. Numbers at branch nodes indicate the times of divergence, calculated using the uncorrelated exponential relaxed-clock model in BEAST v1.4. For an explanation of the letters at branch nodes, see Table 2.
