Clone 803 targets a distinct PSA epitope, providing complementary detection to Clone 801. This monoclonal antibody supports sensitive measurement in ELISA, Western blotting, and antigen‑capture workflows, offering strong affinity and minimal nonspecific binding. MPSA‑80A‑803 is ideal for prostate cancer research, diagnostic assay development, and PSA biomarker studies. Its consistent performance ensures reliable detection across diverse sample matrices.