Enzyme linked immunoassay used to detect Human Immunodeficiency Virus Type 1 (HIV-1) p24 antigen in cell culture media Wells coated with a monoclonal antibody specific for the p24 gag gene product of HIV-1 Monitor the purification and biochemical behavior of HIV-1 Keep refrigerated between 2 to 8°C Use the RETRO-TEK HIV-1 p24 antigen ELISA and ELISA 2.0 immunoassays to detect Human Immunodeficiency Virus Type 1 (HIV-1) p24 antigen in research specimens, including cell culture media, as well as human sera and plasma.