KLK6 and ovarian carcinoma: Most strikingly, 12 kallikreins (KLK2, KLK3, KLK4, KLK5, KLK6, KLK7, KLK8, KLK10, KLK11, KLK13, KLK14, and KLK15) are concurrently upregulated in ovarian cancer (Borgono and Diamandis, 2004).