| Field | Specification |
|---|---|
| Target | |
| Alternative names | Cathepsin D;3.4.23.5;Cathepsin D light chain;Cathepsin D heavy chain;CTSD;CPSD; |
| UniProt # | |
| Host | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | E.coli-derived human Cathepsin D recombinant protein (Position: G65-L412). Human Cathepsin D shares 85% amino acid (aa) sequence identity with both mouse and rat Cathepsin D. |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Lyophilized |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
This rabbit polyclonal antibody recognizes cathepsin D (gene CTSD) in human samples and is validated for Western blot and IHC. The predicted molecular weight is 44.6 kDa, and the supplier reports an observed band at about 40 kDa.
Cathepsin D (CTSD) is a lysosomal aspartic protease that carries out bulk breakdown of proteins in acidic compartments. It also participates in processing of proteins such as amyloid precursor protein. CTSD is studied in lysosomal function, neurodegeneration and breast cancer, where its secretion has been widely investigated.
| Target | Cathepsin D (gene CTSD; UniProt P07339, human) |
|---|---|
| Host / Clonality / Isotype | Rabbit / Polyclonal / Rabbit IgG |
| Reactivity | Human |
| Form | Lyophilized |
| Formulation | Per vial: 0.9 mg NaCl; 0.2 mg Na2HPO4; 0.05 mg NaN3; plus stabilizers |
| Calculated MW | 44.6 kDa |
| Observed MW | 40 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
| IHC (paraffin sections) | 0.5–1 µg/mL (Human) |
|---|---|
| Western blot | 0.1–0.5 µg/mL (Human) |
Conditions in the example images (WB): 5–20% gradient SDS-PAGE, 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 lung 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).
Immunogen
Recombinant human Cathepsin D fragment (Gly65–Leu412), expressed in E. coli. Sequence identity with the mouse and rat orthologs: 85%.
Reactivity Notes
The supplier lists reactivity with human. UniProt describes cathepsin D as secreted and also located in the lysosome and melanosome. Tissue expression noted by UniProt (human): Expressed in the aorta extracellular space (at protein level). 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.
