| Field | Specification |
|---|---|
| Target | |
| Alternative names | Interferon regulatory factor 9;IRF-9;IFN-alpha-responsive transcription factor subunit;ISGF3 p48 subunit;Interferon-stimulated gene factor 3 gamma;ISGF-3 gamma;Transcriptional regulator ISGF3 subunit gamma;IRF9;ISGF3G; |
| UniProt # | |
| Host | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | E. coli-derived human IRF9 recombinant protein (Position: M1-K110). Human IRF9 shares 87.3% amino acid (aa) sequence identity with mouse IRF9. |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Lyophilized |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
This rabbit polyclonal antibody detects interferon regulatory factor 9 (gene IRF9) in human samples and is validated for flow cytometry, ICC/IF, IHC and Western blot. The predicted molecular weight is 43.7 kDa, and the supplier reports an observed band at about 44 kDa.
Interferon regulatory factor 9 (IRF9) is the DNA-binding partner of STAT1 and STAT2 in the ISGF3 complex. After type I interferon receptor signaling through JAK1 and TYK2, ISGF3 enters the nucleus and binds ISRE elements to switch on interferon-stimulated genes, making IRF9 essential for antiviral defense.
| Target | Interferon regulatory factor 9 (gene IRF9; UniProt Q00978, 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 |
| Calculated MW | 43.7 kDa |
| Observed MW | 44 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) |
| Immunocytochemistry / Immunofluorescence | 5 µg/mL (Human) |
| Flow cytometry (fixed cells) | 1–3 µg/1×106 cells (Human) |
Samples with a confirmed band (WB): human SiHa cells, human A431 cells, human PC-3 cells.
Recommended loading (WB): 20–40 µg of total protein per lane.
Conditions in the example images (WB): 10% 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 breast cancer 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 confirmed staining (ICC/IF): U2OS cells.
Samples with a confirmed signal (flow cytometry): PC-3 cells.
Immunogen
Recombinant human IRF9 fragment (Met1–Lys110), expressed in E. coli. Sequence identity with the mouse ortholog: 87.3%.
Reactivity Notes
The supplier lists reactivity with human. UniProt places interferon regulatory factor 9 in the cytoplasm and nucleus. 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.
