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PSA was launched in July 1991 by David Hall, owner of the coin grading company Professional Coin Grading Service (PCGS), to serve collectors as a third-party card grader. [1] At the outset, the business faced difficulties owing to a limited demand from collectors who sought card grading services. [ 2 ]
Prostate-specific antigen (PSA), also known as gamma-seminoprotein or kallikrein-3 (KLK3), P-30 antigen, is a glycoprotein enzyme encoded in humans by the KLK3 gene.PSA is a member of the kallikrein-related peptidase family and is secreted by the epithelial cells of the prostate gland in men and the paraurethral glands in women.
Professional Sports Authenticator (PSA) focuses on sports and trading cards market. PSA/DNA Autograph Authentication and Grading Services focuses on the autographs and memorabilia market. In the publishing field, the company publishes Rare Coin Market Report and Sports Market Report monthly. [7] [8]
Prostate-specific antigen. Prostate-specific antigen (PSA) is secreted by the epithelial cells of the prostate gland and can be detected in a sample of blood. [14] PSA is present in small quantities in the serum of men with healthy prostates, but is often elevated in the presence of prostate cancer or other prostate disorders. [15]
An MRI did not reveal anything and a second PSA test remained high. A biopsy was ordered and in March it revealed early stage cancer. According to Mannix, Wojnarowski learned of the news just ...
NAD also plays a role in DNA repair, inflammation, cellular signaling, circadian rhythm and more. “It’s in all our cells, helping make energy but also helping repair ourselves,” says Martens.