Human Indoleamine-2,3-Dioxygenase (IDO) ELISA Kit
Principle of the Assay
The microtiter plate provided in this kit has been pre-coated with an antibody specific to IDO. Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated antibody preparation specific to IDO. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After the TMB substrate solution is added, only those wells that contain IDO, biotin-conjugated antibody, and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of sulphuric acid solution, and the color change is measured spectrophotometrically at a wavelength of 450nm ± 10nm. The concentration of IDO in the samples is then determined by comparing the O.D. of the samples to the standard curve.
For Use with serum, plasma, and cell culture supernatants. For Research Use Only. Not for use in diagnostic procedures.
Target Information
Catalyzes the first and rate limiting step of the catabolism of the essential amino acid tryptophan along the kynurenine pathway (PubMed:17671174). Involved in the peripheral immune tolerance, contributing to maintain homeostasis by preventing autoimmunity or immunopathology that would result from uncontrolled and overreacting immune responses (PubMed:25691885). Tryptophan shortage inhibits T lymphocytes division and accumulation of tryptophan catabolites induces T-cell apoptosis and differentiation of regulatory T-cells (PubMed:25691885). Acts as a suppressor of anti-tumor immunity (PubMed:23103127, PubMed:25157255, PubMed:14502282, PubMed:25691885). Limits the growth of intracellular pathogens by depriving tryptophan (PubMed:25691885). Protects the fetus from maternal immune rejection (PubMed:25691885).
GENE ID | 3620 |
SWISS PROT | P14902 |
SYNONYMS |
CD107B; INDO; Indoleamine-Pyrrole 2,3 Dioxygenase |
Materials Supplied
Kit Components | 96 Wells Quantity/Size |
---|---|
Pre-coated, ready-to-use 96-well strip plate | 1 plate |
Plate sealer for 96 wells | 2 |
Standard |
2 tubes |
Diluent buffer | 1 bottle |
Detection Reagent A | 1 bottle |
Detection Reagent B | 1 bottle |
TMB Substrate | 1 tube |
Stop Solution | 1 tube |
Wash Buffer (30 ℅ concentrate) | 1 tube |
Product data sheet | 1 copy |
Storage
Storage | The TMB Substrate, Wash Buffer (30X concentrate), and the Stop Solution should be stored at 4°C upon receipt, while the other items should be stored at -20°C. |
Performance Characteristics
REPEATABILITY |
Intra-assay Precision (Precision within an assay): 3 samples with low, middle, and high-level IDO were tested 20 times on one plate, respectively. |
SENSITIVITY | The minimum detectable dose was 0.145ng/mL. |
ASSAY RANGE | 0.312-20ng/mL |
SPECIFICITY | This assay has high sensitivity and excellent specificity for the detection of IDO. No significant cross-reactivity or interference between IDO and analogs was observed. Note: Limited by current skills and knowledge, it is impossible to perform all possible cross-reactivity detection tests between IDO and all analogs, therefore, cross reactivity may still exist. |