| Field | Specification |
|---|---|
| Target | |
| Alternative names | Fatty acid-binding protein, adipocyte;Adipocyte lipid-binding protein;ALBP;Adipocyte-type fatty acid-binding protein;A-FABP;AFABP;Fatty acid-binding protein 4;FABP4; |
| UniProt # | |
| Host | |
| Clone | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | A synthesized peptide derived from human FABP4 |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Liquid |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
Clone AAEF-6 is a rabbit monoclonal antibody that recognizes fatty acid-binding protein, adipocyte (gene FABP4) in human, mouse and rat samples and is validated for Western blot, IHC and ICC/IF. The predicted molecular weight is 14.7 kDa, and the supplier reports an observed band at about 15 kDa.
FABP4 (also called aP2 or A-FABP) is a cytoplasmic fatty acid-binding protein expressed mainly in adipocytes and macrophages. It shuttles long-chain fatty acids inside the cell, and circulating FABP4 has been studied as a marker linked to insulin resistance and cardiovascular risk.
| Target | Fatty acid-binding protein, adipocyte (gene FABP4; UniProt P15090, human) |
|---|---|
| Clone | AAEF-6 |
| Host / Clonality / Isotype | Rabbit / Monoclonal / Rabbit IgG |
| Reactivity | Human, Mouse, Rat |
| Form | Liquid |
| Formulation | PBS (pH 7.4); 150 mM NaCl; 0.02% sodium azide; 50% glycerol; plus stabilizers |
| Calculated MW | 14.7 kDa |
| Observed MW | 15 kDa |
| Storage | Long term: −20 °C for up to 12 months. Frequent use: 4 °C for up to 1 month. Avoid repeated freeze–thaw cycles. |
Validated Applications
| Western blot | 1:500–1:2000 |
|---|---|
| Immunohistochemistry | 1:50–1:200 |
| Immunocytochemistry / Immunofluorescence | 1:50–1:200 |
Samples with a confirmed band (WB): human RT4 cells, human U251 cells, rat thymus tissue, rat heart tissue, rat kidney tissue, mouse thymus tissue, mouse heart tissue, mouse kidney 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 1:500 overnight at 4 °C, HRP-conjugated secondary antibody at 1:5000, ECL detection.
Samples with confirmed staining (IHC): adipose of mouse bladder 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).
Immunogen
Synthetic peptide based on the sequence of human FABP4.
Reactivity Notes
The supplier lists reactivity with human, mouse and rat. UniProt places fatty acid-binding protein, adipocyte 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.
Meijun SONG et al. (2023) FABP4 mediates endoplasmic reticulum stress and autophagy to regulate endometrial epithelial cell function during early sheep gestation. Journal of Reproduction and Development. 10.1262/jrd.2023-015
