A prospective, longitudinal, case-control study assayed and sequenced urinary micropeptides from OC patients and their age-matched volunteers, revealing that urinary catalase (CAT), alpha-1 acid glycoprotein (AAG), and peroxidase-2 (Prx-2) could serve as biomarkers for early detection of ovarian cancer and response to treatment (131). The gene discussed is CAT; the disease is ovarian carcinoma.