Fig. 3
From: Scoring amino acid mutation to predict pandemic risk of avian influenza virus
The distribution of influenza viruses by minimal amino acid set. a Contributions of reduced mutation position sets. The x and y coordinates denote the cutoff (range 10–20) and the AUC values (range 0–1), respectively. b Patterns of human and avian influenza viruses clustered by the multidimensional scaling (MDS) method. Avian influenza viruses were marked by hollow triangle (Red, human-origin; Green, avian-origin). Seasonal and pandemic human influenza viruses were marked by red hollow rectangle. The six artificial H5N1 virus were marked by red solid circle. c human and avian influenza H3N2 viruses in group 4