Other such diagnostic biomarkers include prostate carcinoma mucin-like antigen (PMA), GOLM1, fatty acid synthase (FASN), TMPRSS2-ERG fusion prostate cancer antigen 3 (PCA3), KLK3, KLK2, HOXB13, GRHL2 and FOXA1[8–12]. Here, KLK2 is linked to prostate carcinoma.