KLK3 and neoplasm: Since there is no single platform that can characterize the whole proteome in the cell and many of the clinically applicable tumor biomarkers, such as Prostate-Specific Antigen (PSA) and Carcinoembryonic Antigen (CA125), are glycoproteins [17,18], we tested if glycosylation was aberrantly regulated in the human metastatic cell line models.