| Description | Enzyme immunoassay (ELISA) for the direct quantitative determination of Estrone in human serum. FDA exempt, can be used for in-vitro diagnostics. | Enzyme immunoassay (ELISA) for the determination of IgG-class antibodies to Parvovirus B19 in 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. | Enzyme immunoassay (ELISA) for the determination of Tryptophan in urine, serum, and plasma. For research use only, not for use in diagnostic procedures._x000D_ |