| 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. | 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. | Solid phase sandwich ELISA for the determination of human Endothelial Lipase (EL) in serum, EDTA-plasma and cell culture supernatant. For research use only, not for use in diagnostic procedures. | Immunometric assay (ELISA) for the quantitative measurement of intact proinsulin in heparin or EDTA plasma. Measurements of proinsulin are used in the diagnosis and treatment of patients with type 2 diabetes. FDA exempt, can be used for in-vitro diagnostics. | Enzyme immunoassay (ELISA) for the determination of Tryptophan in urine, serum, and plasma. For research use only, not for use in diagnostic procedures._x000D_ |
| Method | Enzyme-Linked Immunosorbent Assay (ELISA) | Enzyme-Linked Immunosorbent Assay (ELISA) | Enzyme-Linked Immunosorbent Assay (ELISA) | Enzyme-Linked Immunosorbent Assay (ELISA) | Enzyme-Linked Immunosorbent Assay (ELISA) |