title: The occurrence of carcino-embryonic antigen-like immunoreactivity in human semen.
abstract: A substance reacting in a radioimmunoassay for carcino-embryonic antigen (CEA) was found in normal human seminal fluid. It has a mean concentration of 118 ng/ml, it is independent from sperm count and even demonstrable in obstructive azoospermia. Parallelity of dilution curves shows immunologic similarity to the tumor CEA from colon carcinoma. From a gel chromatographic system it is eluted within the same molecular range as iodinated CEA.
mesh_terms: D000328:Adult; D002272:Carcinoembryonic Antigen / Q000032:analysis*; D002850:Chromatography, Gel; D006801:Humans; D007248:Infertility, Male / Q000276:immunology*; D008297:Male; D011863:Radioimmunoassay; D012661:Semen / Q000276:immunology*
chemical_list: D002272:Carcinoembryonic Antigen