| Field | Specification |
|---|---|
| Target | |
| Alternative names | Transcription initiation factor TFIID subunit 4; RNA polymerase II TBP-associated factor subunit C; TBP-associated factor 4; Transcription initiation factor TFIID 130 kDa subunit; TAF(II)130; TAFII-130; TAFII130; Transcription initiation factor TFIID 135 kDa subunit; TAF(II)135; TAFII-135; TAFII135; TAF4; TAF2C; TAF2C1; TAF4A |
| UniProt # | |
| Host | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | E.coli-derived human TAF4 recombinant protein (Position: D6-K1085). |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Lyophilized |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
This rabbit polyclonal antibody recognizes transcription initiation factor TFIID subunit 4 (gene TAF4) in human, mouse and rat samples and is validated for Western blot, IHC, ICC/IF and ELISA. The predicted molecular weight is 110.1 kDa, and the supplier reports an observed band at about 135 kDa.
TAF4 is a core subunit of the general transcription factor TFIID. It helps hold TFIID and TFIIA together at promoters during pre-initiation complex assembly and enhances transcriptional activation by nuclear receptors such as retinoic acid, vitamin D and thyroid hormone receptors.
| Target | Transcription initiation factor TFIID subunit 4 (gene TAF4; UniProt O00268, human) |
|---|---|
| Host / Clonality / Isotype | Rabbit / Polyclonal / Rabbit IgG |
| Reactivity | Human, Mouse, Rat |
| Form | Lyophilized |
| Formulation | Per vial: 4 mg trehalose; 0.9 mg NaCl; 0.2 mg Na2HPO4 |
| Calculated MW | 110.1 kDa |
| Observed MW | 135 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 | 0.1–0.25 µg/mL (Human, Mouse, Rat) |
|---|---|
| IHC (paraffin sections) | 2–5 µg/mL (Human, Mouse, Rat) |
| Immunocytochemistry / Immunofluorescence | 5 µg/mL (Human) |
| ELISA | 0.1–0.5 µg/mL |
Samples with a confirmed band (WB): human HeLa cells, human A431 cells, human K562 cells, human Caco-2 cells, human U2OS cells, human HepG2 cells, human PC-3 cells, rat brain tissue, mouse brain tissue.
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 0.25 µg/mL overnight at 4 °C, HRP-conjugated secondary antibody at 1:5000, ECL detection.
Samples with confirmed staining (IHC): human ovarian serous adenocarcinoma tissue, human ovarian cancer tissue, human breast cancer tissue, human gastric adenocarcinoma tissue, human renal clear cells carcinoma tissue, human tonsil tissue, mouse brain tissue, rat brain 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): Caco-2 cells.
Immunogen
Recombinant human TAF4 fragment (Asp6–Lys1085), expressed in E. coli.
Reactivity Notes
The supplier lists reactivity with human, mouse and rat. UniProt places transcription initiation factor TFIID subunit 4 in the 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.
