| Description | Enzyme Immunoassay (ELISA) for the determination of Gamma-aminobutyric acid (GABA) in human plasma, serum, and urine. For research use only, not for use in diagnostic procedures. | Solid phase sandwich ELISA for the determination each of human, rat and mouse a 2,6-sialyltransferase in serum, EDTA plasma and cell culture supernatant. For research use only, not for use in diagnostic procedures. | Solid phase competitive enzyme immunoassay (ELISA) for the determination of free Thyroxine (fT4) in human serum. For research use only, not for use in diagnostic procedures. | Radioimmunoassay (RIA) for the determination of Free Testosterone in human serum. For research use only, not for use in diagnostic procedures. | Enzyme-linked immunosorbent assay (ELISA) for the determination of IgG-class antibodies to Treponema pallidum in serum. For research use only, not for use in diagnostic procedures. |