For instance, enzyme‐linked immunosorbent assay (ELISA) analysis on sera obtained from patients with nasopharyngeal carcinoma showed that the CatB concentration was 12.5 ± 3.5 mg/L; in healthy controls, it was 2.5 ± 1.4 mg/L [99]. The gene discussed is TYRP1; the disease is nasopharyngeal carcinoma.