31. One example of a commonly used biomarker in medicine is prostate-specific antigen ( PSA ). 32. The hormones are resumed when levels of prostate-specific antigen ( PSA ) begin to rise. 33. For a decade, Robert Martin's annual prostate-specific antigen test had read between 2 and 3. 34. Despite treatment, his prostate specific antigen level, a marker of the disease, continued to rise. 35. Get that PSA ( prostate-specific antigen ) test. 36. Colon cancer tests start around 50, as do PSA or " prostate specific antigen " tests. 37. Most cytotoxic T cells express T-cell receptors ( TCRs ) that can recognize a specific antigen . 38. Coulter has specialized in designing and making monoclonal antibodies, therapeutic products that seek out specific antigens . 39. Also, mammograms go annual and men should get their PSA ( prostate specific antigen ) tests. 40. It also recommended against routine screening for prostate cancer with prostate-specific antigen or digital rectal examination.
