Purity ≥95% SDS-PAGE. Prostatic acid phosphatase (PAP), also prostatic specific acid phosphatase (PSAP), is an enzyme produced by the prostate. It may be found in increased amounts in men who have prostate cancer or other diseases. The highest levels of acid phosphatase are found in metastasized prostate cancer. Applications: Suitable for use in ELISA or for antigen applications in immunological protocols.