| Field | Specification |
|---|---|
| Target | |
| Alternative names | Interleukin-1 receptor antagonist protein;IL-1RN;IL-1ra;IRAP;ICIL-1RA;IL1 inhibitor;Anakinra;IL1RN;IL1F3, IL1RA; |
| UniProt # | |
| Host | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | E. coli-derived human IL1RA recombinant protein (Position: R26-E177). Human IL1RA shares 77% and 75.5% amino acid (aa) sequence identity with mouse and rat IL1RA, respectively. |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Lyophilized |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
This rabbit polyclonal antibody recognizes interleukin-1 receptor antagonist protein (gene IL1RN) in human samples and is validated for ELISA, IHC, Western blot and flow cytometry. The predicted molecular weight is 20.1 kDa, and the supplier reports an observed band at about 20 kDa.
The interleukin-1 receptor antagonist (IL-1Ra, IL1RN) is a natural inhibitor of IL-1 signaling. It binds IL1R1 without recruiting the co-receptor IL1RAP, blocking the actions of IL-1α and IL-1β, and deficiency of IL1RN causes severe autoinflammation, highlighting its role in keeping IL-1 activity in check.
| Target | Interleukin-1 receptor antagonist protein (gene IL1RN; UniProt P18510, human) |
|---|---|
| Host / Clonality / Isotype | Rabbit / Polyclonal / Rabbit IgG |
| Reactivity | Human |
| Form | Lyophilized |
| Formulation | Per vial: 4 mg trehalose; 0.9 mg NaCl; 0.2 mg Na2HPO4; 0.01 mg NaN3 |
| Calculated MW | 20.1 kDa |
| Observed MW | 20 kDa |
| Storage | As supplied: −20 °C for up to 12 months from receipt. After reconstitution: 4 °C for up to 1 month, or aliquot and keep at −20 °C for up to 6 months. Avoid repeated freeze–thaw cycles. |
Validated Applications
| Western blot | 0.1–0.5 µg/mL (Human) |
|---|---|
| IHC (paraffin sections) | 2–5 µg/mL (Human) |
| Flow cytometry (fixed cells) | 1–3 µg/1×106 cells (Human) |
| ELISA | 0.1–0.5 µg/mL |
Samples with a confirmed band (WB): human RT4 cells, human Hacat cells.
Recommended loading (WB): 20–40 µg of total protein per lane.
Conditions in the example images (WB): 5–20% gradient SDS-PAGE under reducing conditions, 30 µg lysate per lane, transfer to nitrocellulose membrane, blocking in 5% non-fat milk, primary antibody at 0.5 µg/mL overnight at 4 °C, HRP-conjugated secondary antibody at 1:5000, ECL detection.
Samples with confirmed staining (IHC): human esophageal squamous carcinoma tissue.
Recommended antigen retrieval: heat-mediated, in TE buffer (pH 9.0); citrate buffer (pH 6.0) can be used instead.
Conditions in the example images (IHC): heat-mediated antigen retrieval in EDTA buffer (pH 8.0).
Samples with a confirmed signal (flow cytometry): U937 cells.
Immunogen
Recombinant human IL1RA fragment (Arg26–Glu177), expressed in E. coli. Sequence identity with the mouse and rat orthologs: 77% and 75.5%, respectively.
Reactivity Notes
The supplier lists reactivity with human. Tissue expression noted by UniProt (human): The intracellular form of IL1RN is predominantly expressed in epithelial cells. The samples tested by the supplier (listed above) are a practical starting point for positive controls.
Safety
Customization & Add-ons: Can’t find the antibody you need—or require a custom format for your assay? We can help you source the best match or support custom antibody solutions for diverse research needs, including species and isotype selection, conjugations and labeling (e.g., HRP/AP, biotin, fluorophores), purification grade options (Protein A/G, affinity purified), formulation preferences (buffer selection, carrier-free, glycerol-free), custom concentrations and aliquoting, low-endotoxin options for cell-based work, and application-focused QC/validation support (project dependent). Click Talk to a Scientist to submit a request, email us at support@biohippo.com, or explore our Research Services for additional support—our team will follow up with feasibility details and next steps.
