| Description | Enzyme immunoassay (ELISA) for the determination of Tryptophan in urine, serum, and plasma. For research use only, not for use in diagnostic procedures._x000D_ | Enzyme immunoassay (ELISA) for the determination of Neopterin in human serum, plasma and urine. For research use only, not for use in diagnostic procedures. | Immunoradiometric assay (RIA) for the determination of human prolactin (PRL) in serum and plasma. FDA exempt, can be used for in-vitro diagnostics. | Solid phase sandwich ELISA for the determination of Human Tenascin-C containing high molecular weight variants (Human Tenascin-C HMWV) in serum, plasma (heparin), or cell culture media. For research use only, not for use in diagnostic procedures. | Radioimmunoassay (RIA) for the determination of human Testosterone in serum. For research use only, not for use in diagnostic procedures. |