The protein encoded by this gene is a kallikrein-related serine protease. This gene is activated by steroid hormones in a human breast cancer cell line, making it a good marker for cancer detection. The encoded protein is found primarily in the cytoplasm.[provided by RefSeq, Oct 2010].
Diamandis, Yousef, Luo, Magklara, Obiezu: "The new human kallikrein gene family: implications in carcinogenesis." in: Trends in endocrinology and metabolism: TEM, Vol. 11, Issue 2, pp. 54-60, (2001) (PubMed).
Yousef, Kyriakopoulou, Scorilas, Fracchioli, Ghiringhello, Zarghooni, Chang, Diamandis, Giardina, Hartwick, Richiardi, Massobrio, Diamandis, Katsaros: "Quantitative expression of the human kallikrein gene 9 (KLK9) in ovarian cancer: a new independent and favorable prognostic marker." in: Cancer research, Vol. 61, Issue 21, pp. 7811-8, (2001) (PubMed).
Yousef, Diamandis: "The expanded human kallikrein gene family: locus characterization and molecular cloning of a new member, KLK-L3 (KLK9)." in: Genomics, Vol. 65, Issue 2, pp. 184-94, (2000) (PubMed).