| Field | Specification |
|---|---|
| Target | |
| Alternative names | Fibroblast growth factor 21;FGF-21;FGF21;UNQ3115/PRO10196; |
| UniProt # | |
| Host | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | A synthetic peptide corresponding to a sequence at the N-terminus of human FGF21, different from the related rat and mouse sequences by two amino acids. |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Lyophilized |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
This rabbit polyclonal antibody recognizes fibroblast growth factor 21 (gene FGF21) in human, mouse and rat samples and is validated for Western blot. The predicted molecular weight is 22.3 kDa, and the supplier reports an observed band at about 21 kDa.
Fibroblast growth factor 21 (FGF21) is an endocrine FGF made mainly by the liver in response to fasting and nutritional stress. It signals through FGF receptors together with the coreceptor β-Klotho to increase glucose uptake in fat cells and improve insulin sensitivity. FGF21 is widely studied in energy metabolism, obesity and metabolic disease.
| Target | Fibroblast growth factor 21 (gene FGF21; UniProt Q9NSA1, 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; 0.01 mg NaN3 |
| Calculated MW | 22.3 kDa |
| Observed MW | 21 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, Mouse, Rat) |
|---|
Samples with a confirmed band (WB): A549 cells, A431 cells, HEPA cells, rat spleen 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, 50 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 1:10000, ECL detection.
Immunogen
Synthetic peptide from the N-terminal region of human FGF21. It differs from the rat and mouse sequences at two residues.
Reactivity Notes
The supplier lists reactivity with human, mouse and rat. UniProt describes fibroblast growth factor 21 as a secreted protein. 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.
