Semenogelase (, prostate-specific antigen, alpha-seminoprotein, seminin, P-30 antigen, antigen (human clone HPSA-1 prostate-specific protein moiety reduced), gamma-seminoglycoprotein (human protein moiety reduced), gamma-SM, antigen PSA (human prostate-specific), human glandular kallikrein, antigen PSA (human clone 5P1 protein moiety reduced)) is an enzyme. This enzyme catalyses the following chemical reaction
This peptidase from trypsin family is present in seminal plasma.