Serum hK2 levels were significantly higher among cases (mean hK2 = 0.246 ng/mL) than controls (mean hK2 = 0.228 ng/mL, p = 0.02), and the rs198977 KLK2 SNP was significantly associated with prostate cancer (Table 1). The gene discussed is KLK2; the disease is prostate carcinoma.