| Description | Radioimmunoassay (RIA) for the determination of Free Testosterone in human serum. For research use only, not for use in diagnostic procedures. | The Complement C4d assay is an enzyme-linked immunosorbent assay (ELISA) for the semiquantitative determination of C4d in human plasma. For research use only, not for use in diagnostic procedures. | Enzyme immunoassay (ELISA) for the determination of IGF-II in human serum, plasma, urine, saliva, and cell culture supernatants. For research use only, not for use in diagnostic procedures. | Solid phase sandwich ELISA for the determination of Human Syndecan-4 in serum, EDTA plasma and cell culture supernatant. For research use only, not for use in diagnostic procedures. | Enzyme immunoassay (ELISA) for the determination of free active testosterone in saliva. For research use only, not for use in diagnostic procedures. |