| Field | Specification |
|---|---|
| Target | |
| Alternative names | Cytochrome c oxidase subunit 4 isoform 1, mitochondrial;Cytochrome c oxidase polypeptide IV;Cytochrome c oxidase subunit IV isoform 1;COX IV-1;COX4I1;COX4; |
| UniProt # | |
| Host | |
| Clone | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | A synthesized peptide derived from COX IV |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Liquid |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
Clone 26C49 is a rabbit monoclonal antibody that recognizes cytochrome c oxidase subunit 4 isoform 1, mitochondrial (gene COX4I1) in human, mouse and rat samples and is validated for Western blot, IHC, ICC/IF, immunoprecipitation and flow cytometry. The predicted molecular weight is 19.6 kDa, and the supplier reports an observed band at about 17 kDa.
COX4I1 is the widely expressed isoform of subunit 4 of cytochrome c oxidase (complex IV), the terminal enzyme of the mitochondrial respiratory chain that transfers electrons to oxygen. As a nuclear-encoded regulatory subunit it is commonly used as a mitochondrial loading control and marker in Western blot and imaging studies.
| Target | Cytochrome c oxidase subunit 4 isoform 1, mitochondrial (gene COX4I1; UniProt P13073, human) |
|---|---|
| Clone | 26C49 |
| Host / Clonality / Isotype | Rabbit / Monoclonal / 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 | 19.6 kDa |
| Observed MW | 17 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 |
| Immunoprecipitation | 1:50 |
| Flow cytometry | 1:50 |
Samples with a confirmed band (WB): human HepG2 cells, human Caco-2 cells, human SiHa cells, human MCF-7 cells, rat brain 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 1:500 overnight at 4 °C, HRP-conjugated secondary antibody at 1:500, ECL detection.
Samples with confirmed staining (IHC): human cervical cancer tissue, human liver cancer tissue, mouse kidney 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 COX IV.
Reactivity Notes
The supplier lists reactivity with human, mouse and rat. UniProt places cytochrome c oxidase subunit 4 isoform 1, mitochondrial in the mitochondrion inner 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.
