| Field | Specification |
|---|---|
| Target | |
| Alternative names | DNA-directed RNA polymerase II subunit RPB3; RNA polymerase II subunit 3; RNA polymerase II subunit B3; DNA-directed RNA polymerase II 33 kDa polypeptide; RPB33; DNA-directed RNA polymerase II subunit C; RPB31; POLR2C |
| Gene ID | |
| UniProt # | |
| Host | |
| Clone | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | A synthesized peptide derived from human POLR2C |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Liquid |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
Clone 22P91 is a rabbit monoclonal antibody that recognizes DNA-directed RNA polymerase II subunit RPB3 (gene POLR2C) in human, mouse and rat samples and is validated for Western blot and IHC. The predicted molecular weight is 31.4 kDa, and the supplier reports an observed band at about 33 kDa.
POLR2C (RPB3) is a core subunit of RNA polymerase II, the enzyme that transcribes protein-coding genes into mRNA precursors. It forms part of the platform on which the two largest subunits assemble, and is used in studies of transcription machinery and gene expression.
| Target | DNA-directed RNA polymerase II subunit RPB3 (gene POLR2C; UniProt P19387, human) |
|---|---|
| Clone | 22P91 |
| 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 | 31.4 kDa |
| Observed MW | 33 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 | 1:1000–1:5000 |
|---|---|
| Immunohistochemistry | 1:50–1:200 |
Samples with a confirmed band (WB): Jurkat cells.
Recommended loading (WB): 20–40 µg of total protein per lane.
Immunogen
Synthetic peptide based on the sequence of human POLR2C.
Reactivity Notes
The supplier lists reactivity with human, mouse and rat. UniProt places DNA-directed RNA polymerase II subunit RPB3 in the nucleus. 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.
