<unk>  <unk> , also known as gamma-seminoprotein or kallikrein-3 (KLK3), P-30 antigen, is a glycoprotein enzyme encoded in humans by the KLK3 gene.<unk>  is a member of the kallikrein-related peptidase family and is secreted by the epithelial cells of the prostate gland.<unk>  is produced for the ejaculate, where it liquefies semen in the seminal coagulum and allows sperm to swim freely. It is also believed to be instrumental in dissolving cervical mucus, allowing the entry of sperm into the uterus.<unk>  is present in small quantities in the serum of men with healthy prostates, but is often elevated in the presence of prostate cancer or other prostate disorders.<unk>  is not uniquely an indicator of prostate cancer, but may also detect prostatitis or benign prostatic hyperplasia.
Prostate-specific antigen
Carcinoembryonic antigen
Alpha-fetoprotein
Carcinoembryonic antigen peptide-1
Early prostate cancer antigen-2
Mammaglobin
CA 15-3
CA19-9