| Field | Specification |
|---|---|
| Target | |
| Alternative names | C-X-C motif chemokine 9;Gamma-interferon-induced monokine;Monokine induced by interferon-gamma;HuMIG;MIG;Small-inducible cytokine B9;CXCL9;CMK, MIG, SCYB9; |
| Gene ID | |
| UniProt # | |
| Reactivity | |
| Applications | |
| Immunogen | Expression system for standard: E.coli; Immunogen sequence: T23-T125 |
| Expression system | |
| Expression region | |
| Assay type | |
| Sample type(s) | Cell Culture Supernatant, Cell Lysate, Serum, Plasma |
| Sensitivity | |
| Detection range | |
| Assay time | |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Assay Principle
This sandwich ELISA quantifies human C-X-C motif chemokine 9 (gene CXCL9) in cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA). Strips are pre-coated with a capture antibody. After the sample is added, a biotinylated detection antibody binds the captured protein, and an avidin–biotin–peroxidase complex supplies the enzyme. TMB develops color in proportion to the bound target; the reaction is stopped and read at 450 nm, and concentrations are read from the standard curve.
CXCL9 (MIG) is an interferon-γ-inducible chemokine that binds CXCR3 and attracts activated T cells and NK cells. Together with CXCL10 and CXCL11, it directs effector lymphocytes to inflamed tissues and tumors, so it is widely measured in studies of Th1 immunity, autoimmunity, transplantation and cancer immunology.
Kit Components
| Anti-Human CXCL9 Pre-coated 96-well strip microplate | 1 plate (96 wells) |
|---|---|
| Human CXCL9 Standard | 2 vials, 10 ng/tube |
| Human CXCL9 Biotinylated antibody (100x) | 100 µL |
| Avidin-Biotin-Peroxidase Complex (100x) | 100 µL |
| Sample Diluent | 30 mL |
| Antibody Diluent | 12 mL |
| Avidin-Biotin-Peroxidase Diluent | 12 mL |
| Color Developing Reagent (TMB) | 10 mL |
| Stop Solution | 10 mL |
| Wash Buffer (25x) | 20 mL |
| Adhesive plate sealers | 4 |
Also required (not supplied): microplate reader for 450 nm; incubator; automated plate washer (optional); precision pipettes for 0.5 µL through 1 mL volumes of aqueous solutions; multichannel pipettes (recommended for many samples); deionized or distilled water; 500 mL graduated cylinders; test tubes for dilution.
Kit components are not sold separately.
Performance Data
| Species | Human |
|---|---|
| Sample types | Cell culture supernatants, cell lysates, serum and plasma (heparin, EDTA) |
| Assay range | 31.2 pg/mL–2,000 pg/mL |
| Sensitivity | <2 pg/mL |
| Standard | Recombinant human CXCL9 (Thr23–Thr125), expressed in E. coli |
| Cross-reactivity | None detected against related proteins in supplier testing |
| Intra-assay CV | 4.2–7.8% (3 samples, n = 16 each) |
| Inter-assay CV | 4.3–8.0% (3 samples, n = 24 each) |
| Format | 96 wells, removable strips |
Sample dilution: start at 1:1. In the supplier’s tests, serum and plasma samples measured about 200 pg/mL.
Example standard curve (OD450, pg/mL): 0 = 0.02; 31.2 = 0.095; 62.5 = 0.161; 125 = 0.26; 250 = 0.437; 500 = 0.781; 1000 = 1.401; 2000 = 2.374. Run a new standard curve on every plate.
Storage & Handling
Store at 4 °C for up to 6 months or −20 °C for up to 12 months. Avoid repeated freeze–thaw cycles. Ships on gel ice and tolerates up to 3 days at room temperature; freeze on arrival.
Safety
Sample data
| Concentration (pg/ml) | 0 | 31.2 | 62.5 | 125 | 250 | 500 | 1000 | 2000 |
| O.D. | 0.02 | 0.095 | 0.161 | 0.26 | 0.437 | 0.781 | 1.401 | 2.374 |
Intra/inter assay consistency
| Intra-Assay Precision | Inter-Assay Precision | |||||
|---|---|---|---|---|---|---|
| Sample | 1 | 2 | 3 | 1 | 2 | 3 |
| n | 16 | 16 | 16 | 24 | 24 | 24 |
| Mean (pg/ml) | 84 | 277 | 773 | 77 | 272 | 823 |
| Standard deviation | 6.55 | 11.63 | 57.2 | 6.16 | 11.69 | 60.9 |
| CV (%) | 7.8% | 4.2% | 7.4% | 8% | 4.3% | 7.4% |
Kit components
Description|Quantity Pre-coated 96-well strip microplate|1 Standard|2 vials Biotinylated antibody (100x)|100ul Avidin-Biotin-Peroxidase Complex (100x)|100ul Sample Diluent|30ml Antibody Diluent|12ml Avidin-Biotin-Peroxidase Diluent|12ml Color Developing Reagent (TMB)|10ml Stop Solution|10ml Wash Buffer (25x)|20ml Adhesive plate sealers|4Materials required but not provided
- Microplate Reader capable of reading absorbance at 450nm.
- Incubator.
- Automated plate washer (optional).
- Pipettes and pipette tips capable of precisely dispensing 0.5 µl through 1 ml volumes of aqueous solutions.
- Multichannel pipettes are recommended for large amount of samples.
- Deionized or distilled water.
- 500ml graduated cylinders.
- Test tubes for dilution.
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Xiang Cai et al. (2024) JMJD2A promotes the development of castration-resistant prostate cancer by activating androgen receptor enhancer and inhibiting the cGAS-STING pathway. Molecular Carcinogenesis. 10.1002/mc.23753
Leonardo R. Rocha et al. (2017) Bone intramedullary reaming grafts the fracture site with CD146+ skeletal progenitors and downmodulates the inflammatory environment. Injury-International Journal of the Care of the Injured. 10.1016/S0020-1383(17)30774-X
Y Lu et al. (2017) A correlation study between gene polymorphism of Th cell expressed chemokine receptor CXCR3 and its ligand levels with HCV infection prognosis. European Review for Medical and Pharmacological Sciences. PMID: 28387899
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