Kallikrein-3 (KLK3) is also known as Prostate-specific antigen (PSA), APS, Gamma-seminoprotein (Seminin), P-30 antigen, Semenogelase, is a glycoprotein enzyme, is a member of the kallikrein-related peptidase family and is secreted by the epithelial cells of the prostate gland. The preferential cleavage site of KLK3 is ``-Tyr-|-Xaa-``, the catalytic activity is inhibited by SERPINA5 and is strongly inhibited by Zn2+. KLK3 hydrolyzes semenogelin-1 thus leading to the liquefaction of the seminal coagulum. This protein is fused with 6xHis tag at the C-terminus, has a calculated MW of 27.7 kDa. The predicted N-terminus is Ala 18. DTT-reduced Protein migrates as 36 kDa due to glycosylation. Purity ≥92%