Lee RE: SARS Coronavirus Appears to be an FcgammaR Agent, Causing an Hyperimmune Response via a CD13 pathway - Implication for Therapeutic Interventions. JOIMR 2003;1:2

Figure 3: SARS Coronavirus E2-spike Protein Phylogram
(data from EBI Clust-W multple sequence alignment program; phylogram drawn by "Treeview" program).