| Field | Specification |
|---|---|
| Target | |
| Alternative names | Calpain-2 catalytic subunit;3.4.22.53;Calcium-activated neutral proteinase 2;CANP 2;Calpain M-type;Calpain large polypeptide L2;Calpain-2 large subunit;Millimolar-calpain;M-calpain;CAPN2;CANPL2; |
| UniProt # | |
| Host | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | E. coli-derived human Calpain 2 recombinant protein (Position: R500-L700). Human Calpain 2 shares 93.5% and 92.5% amino acid (aa) sequence identity with mouse and rat Calpain 2, respectively. |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Lyophilized |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
This rabbit polyclonal antibody targets calpain-2 catalytic subunit (gene CAPN2) in human, mouse and rat samples and is validated for flow cytometry, ICC/IF, IHC and Western blot. The predicted molecular weight is 80.0 kDa, and the supplier reports an observed band at about 80 kDa.
Calpain-2 (m-calpain) is a ubiquitous Ca2+-dependent cysteine protease that forms a heterodimer with CAPNS1. Through limited proteolysis of cytoskeletal and signaling substrates, it regulates focal adhesion turnover, cell migration and neuronal signaling, and it is studied in neurodegeneration, cancer and tissue injury.
| Target | Calpain-2 catalytic subunit (gene CAPN2; UniProt P17655, 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; 0.05 mg NaN3 |
| Calculated MW | 80.0 kDa |
| Observed MW | 80 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, Rat) |
|---|---|
| Western blot | 0.1–0.5 µg/mL (Human, Mouse, Rat) |
| Immunocytochemistry / Immunofluorescence | 2 µg/mL (Human) |
| Flow cytometry (fixed cells) | 1–3 µg/1×106 cells (Human) |
Samples with a confirmed band (WB): human HepG2 cells, human A431 cells, human HeLa cells, rat kidney tissue, rat brain tissue, mouse kidney tissue, mouse brain 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 0.5 µg/mL overnight at 4 °C, HRP-conjugated secondary antibody at 1:5000, ECL detection.
Samples with confirmed staining (IHC): human intestinal cancer tissue, human lung cancer tissue, rat small intestine 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 citrate buffer (pH 6).
Samples with confirmed staining (ICC/IF): HeLa cells.
Samples with a confirmed signal (flow cytometry): U87 cells.
Immunogen
Recombinant human Calpain 2 fragment (Arg500–Leu700), expressed in E. coli. Sequence identity with the mouse and rat orthologs: 93.5% and 92.5%, respectively.
Reactivity Notes
The supplier lists reactivity with human, mouse and rat. UniProt places calpain-2 catalytic subunit in the cytoplasm and cell membrane. Tissue expression noted by UniProt (human): Ubiquitous. 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.
Liu Haiying et al. (2021) Tunicamycin Induces Hepatic Stellate Cell Apoptosis Through Calpain-2/Ca2 +-Dependent Endoplasmic Reticulum Stress Pathway. Frontiers in Cell and Developmental Biology. 10.3389/fcell.2021.684857
