| Field | Specification |
|---|---|
| Target | |
| Alternative names | Breast cancer type 1 susceptibility protein;6.3.2.-;RING finger protein 53;BRCA1;RNF53; |
| UniProt # | |
| Host | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | E.coli-derived human BRCA1 recombinant protein (Position: E1661-Y1863). Human BRCA1 shares 65% and 66% amino acid (aa) sequences identity with mouse and rat BRCA1, respectively. |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Lyophilized |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
This rabbit polyclonal antibody detects breast cancer type 1 susceptibility protein (gene BRCA1) in human, mouse and rat samples and is validated for Western blot, IHC and flow cytometry. The predicted molecular weight is 207.7 kDa, and the supplier reports an observed band at about 290 kDa.
BRCA1 is a tumor suppressor that forms an E3 ubiquitin ligase with BARD1 and acts in several nuclear complexes that sense and repair DNA double-strand breaks, especially by homologous recombination. It also supports cell cycle checkpoints and genome stability, and inherited BRCA1 mutations greatly increase the risk of breast and ovarian cancer.
| Target | Breast cancer type 1 susceptibility protein (gene BRCA1; UniProt P38398, 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 | 207.7 kDa |
| Observed MW | 290 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, Mouse, Rat) |
| Flow cytometry (fixed cells) | 1–3 µg/1×106 cells (Human) |
Samples with a confirmed band (WB): human HeLa cells, human T-47D cells, human Raji 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 tonsil tissue, human laryngeal squamous cells carcinoma tissue, human thyroid cancer tissue, human colorectal adenocarcinoma 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 a confirmed signal (flow cytometry): HepG2 cells.
Immunogen
Recombinant human BRCA1 fragment (Glu1661–Tyr1863), expressed in E. coli. Sequence identity with the mouse and rat orthologs: 65% and 66%, respectively.
Reactivity Notes
The supplier lists reactivity with human, mouse and rat. UniProt places breast cancer type 1 susceptibility protein in the nucleus, chromosome and cytoplasm. Tissue expression noted by UniProt (human): Isoform 1 and isoform 3 are widely expressed. 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.
Yifei Cheng et al. (2026) A conserved eIF1A+ luminal cell-centered hypoxic and “cold” tumor microenvironment promotes pan-subtype prostate cancer progression. Cell Reports Medicine. 10.1016/j.xcrm.2026.102619
Micah G. Donovan et al. (2019) Epigenetic Activation of BRCA1 by Genistein In Vivo and Triple Negative Breast Cancer Cells Linked to Antagonism toward Aryl Hydrocarbon Receptor. Nutrients. 10.3390/nu11112559
