This monoclonal antibody provides highly specific detection of human Prostate‑Specific Antigen (PSA), a key biomarker used in prostate cancer research and diagnostic assay development. Clone 801 delivers strong affinity and low background in ELISA, Western blotting, and antigen‑capture assays, enabling precise PSA quantification in serum, plasma, and purified antigen preparations. MPSA‑80A‑801 offers consistent, reproducible performance across repeated assays, supporting oncology research and biomarker validation.