| Field | Specification |
|---|---|
| Target | |
| Alternative names | Cytotoxic T-lymphocyte protein 4; Cytotoxic T-lymphocyte-associated antigen 4; CTLA-4; CD antigen CD152; Ctla4; Cd152 |
| Gene ID | |
| UniProt # | |
| Reactivity | |
| Applications | |
| Immunogen | Expression system for standard: NS0; Immunogen sequence: A37-F162 |
| Expression system | |
| Expression region | |
| Assay type | |
| Sample type(s) | Cell Culture Supernatant, Serum, Plasma |
| Sensitivity | |
| Detection range | |
| Assay time | |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Assay Principle
This EZ-Set™ kit supplies a matched capture and detection antibody pair and a standard for building your own sandwich ELISA for mouse cytotoxic T-lymphocyte protein 4 (gene Ctla4) in cell culture supernatants, serum and plasma (heparin). You coat the plate with the capture antibody, add samples and standards, detect with the biotinylated antibody and an avidin–biotin–peroxidase complex, develop with TMB and read at 450 nm. Plates, diluents, wash buffer, TMB and stop solution are not included.
CTLA-4 (CD152) is an inhibitory receptor on activated T cells and regulatory T cells that dampens T-cell responses. It binds the B7 ligands CD80 and CD86 with much higher affinity than the costimulatory receptor CD28, competing with CD28 for these ligands and limiting activation. CTLA-4 is a key immune checkpoint studied in autoimmunity, tolerance and cancer immunotherapy.
Kit Components
| Mouse anti-mouse Ctla4 monoclonal antibody (Capture Antibody) | 500 µL, 4 mg/mL (recommended dilution 1:100) |
|---|---|
| Biotinylated goat anti-mouse Ctla4 polyclonal antibody (Detection Antibody) | 500 µL, 0.075 µg/mL (recommended dilution 1:100) |
| Avidin-Biotin-Peroxidase Complex (ABC) | 500 µL (recommended dilution 1:100) |
| Lyophilized recombinant mouse Ctla4 standard | 3 × 10 ng/tube |
Kit components are not sold separately.
Performance Data
| Species | Mouse |
|---|---|
| Sample types | Cell culture supernatants, serum and plasma (heparin) |
| Assay range | 31.2 pg/mL–2,000 pg/mL |
| Standard | Recombinant mouse Ctla4 (Ala37–Phe162), expressed in NS0 |
| Cross-reactivity | None detected against related proteins in supplier testing |
| Format | Reagents for five 96-well plates (plates not included) |
Example standard curve (OD450, pg/mL): 0 = 0.001; 31.2 = 0.174; 62.5 = 0.308; 125 = 0.597; 250 = 1.018; 500 = 1.358; 1000 = 1.742; 2000 = 1.840. 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. | 0.001 | 0.174 | 0.308 | 0.597 | 1.018 | 1.358 | 1.742 | 1.840 |
Kit components
| Catalog number | Description | Quantity | Storage of opened/reconstituted material |
|---|---|---|---|
| EZ0717-CA | Mouse anti- mouse Ctla4 monoclonal antibody (Capture Antibody) | 500 µl, 4 mg/mL (recommended dilution 1:100) | Store undiluted at 4°C for 1 month or at -20°C for 3 months provided this is within the expiration date of the kit. |
| EZ0717-DA | Biotinylated goat anti- mouse Ctla4 polyclonal antibody (Detection Antibody) | 500 µl, 0.075 µg/mL (recommended dilution 1:100) | |
| AR1103 | Avidin-Biotin-Peroxidase Complex (ABC) | 500 µl (recommended dilution 1:100) | |
| EK0717-ST | Lyophilized recombinant mouse Ctla4 standard | 10 ng/tube×3 | Discard the standard stock solution after 12 hours at 4°C. May be stored at -20°C for 48 hours provided this is within the expiration date of the kit. |
Materials required but not provided
- Microplate reader in standard size.
- Automated plate washer.
- Incubator.
- Adjustable pipettes and pipette tips. Multichannel pipettes are recommended in the condition of large amount of samples in the detection.
- Clean tubes and Eppendorf tubes.
- 96 well microplate (Cat# AR1100)
- Plate Sealers.
- Capture Antibody Diluent: PBS.
- Reagent Diluent: 1% BSA in PBS, pH 7.2-7.4, 0.2 µm filtered.
- Substrate Solution: Tetramethylbenzidine (Cat# AR1104)
- Stop Solution: 2 N H2SO4 (Cat# AR1105)
- Wash Buffer (PBS and PBS-T). Recipes:
- PBS: 8g NaCl, 0.2g KCl, 1.15g Na2HPO4, 0.2g KH2PO4, adjust the total volume to 1 L with distilled water, pH 7.2-7.4, 0.2 µm filtered.
- PBS-T: 0.1% Tween® 20 in PBS, pH 7.2-7.4.
- *Item 6 – 12 are included in the EZ Set Accessory Kit (EZA001)
Can’t Find What You’re Looking For? We can help you source the best match or customize an ELISA solution for your study. Options may include alternative target synonyms, different species reactivity, sample type/matrix compatibility (serum/plasma/lysate/supernatant), assay format (sandwich/competitive), sensitivity/range, detection chemistry (colorimetric/fluorescent/chemiluminescent), plate format (pre-coated/uncoated, strips vs full plate), and bulk or custom packaging. Click Talk to a Scientist to submit a request form, email us at support@biohippo.com, or explore our Research Services for additional support. Our team will be in contact with you shortly.
