Fig. 3. Gel view of partial protein chip array profiling results in SARS patients’ sera vs control infection groups’ sera. Part of the profiling results of fraction 1 from the ion exchange serum eluate in SARS patients vs the control patients in m/z range from 2000 to 15,000 was illustrated. HBV, hepatitis B virus; TB, M. tuberculosis; RSV, respiratory syncytial virus. The three arrows showed three clusters of biomarkers, A–C at m/z of 11695, 9159, and 7784, respectively, with cluster A being significantly increased in SARS patients and the last two clusters (B and C) significantly decreased.