Figure 2: Mean percentage of volume contribution of 2-DE detectable serum proteins of patients with NPC. The Molecular analyst PD Quest densitometry software (Bio-Rad, Hercules, Calif., USA) was used to analyze the volumes of protein spots. AAT: α1-antitrypsin, ABG: α1-B glycoprotein, AHS: α2-HS glycoprotein, CFB: complement factor B, CLU: clusterin, CPL: ceruloplasmin, HAP: haptoglobin (β chain), PR1 to 3: unidentified proteins. The normal controls and newly diagnosed patients with nasopharyngeal carcinoma prior to treatment were shown as CON and NPC respectively. Asterisk denotes the value of statistical significant difference.