| Field | Specification |
|---|---|
| Target | |
| Alternative names | Carboxypeptidase B2;3.4.17.20 ;Carboxypeptidase U;CPU;Plasma carboxypeptidase B;pCPB;Thrombin-activable fibrinolysis inhibitor;TAFI;CPB2; |
| UniProt # | |
| Host | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | E. coli-derived human CPB2 recombinant protein (Position: K166-D388). Human CPB2 shares 86.1% and 85.7% amino acid (aa) sequence identity with mouse and rat CPB2, respectively. |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Lyophilized |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
This rabbit polyclonal antibody detects carboxypeptidase B2 (gene CPB2) in human samples and is validated for ELISA, IHC and Western blot. The predicted molecular weight is 48.4 kDa; the supplier reports observed bands at 48 kDa, 60 kDa.
Carboxypeptidase B2 (CPB2), also called TAFI, is a plasma carboxypeptidase activated by the thrombin–thrombomodulin complex. It removes C-terminal lysines from partially degraded fibrin, which slows plasminogen binding and fibrinolysis, and it also inactivates bradykinin and anaphylatoxins, linking coagulation and inflammation.
| Target | Carboxypeptidase B2 (gene CPB2; UniProt Q96IY4, 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 | 48.4 kDa |
| Observed MW | 48 kDa, 60 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) | 0.5–1 µg/mL (Human) |
| ELISA (capture antibody) | 1–5 µg/mL (Human) |
Samples with a confirmed band (WB): human placenta tissue, HepG2 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 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 CPB2 fragment (Lys166–Asp388), expressed in E. coli. Sequence identity with the mouse and rat orthologs: 86.1% and 85.7%, respectively.
Reactivity Notes
The supplier lists reactivity with human. UniProt describes carboxypeptidase B2 as a secreted protein. Tissue expression noted by UniProt (human): Plasma. 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.
