| Field | Specification |
|---|---|
| Target | |
| Alternative names | Transcription elongation factor SPT5; hSPT5; DRB sensitivity-inducing factor 160 kDa subunit; DSIF p160; DRB sensitivity-inducing factor large subunit; DSIF large subunit; Tat-cotransactivator 1 protein; Tat-CT1 protein; SUPT5H; SPT5; SPT5H |
| UniProt # | |
| Host | |
| Clone | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | A synthesized peptide derived from human SUPT5H |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Liquid |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
Clone 25S69 is a rabbit monoclonal antibody that recognizes transcription elongation factor SPT5 (gene SUPT5H) in human, mouse and rat samples and is validated for Western blot, IHC and ICC/IF. The predicted molecular weight is 121.0 kDa, and the supplier reports an observed band at about 150 kDa.
SPT5 (SUPT5H) pairs with SPT4 to form the DSIF complex, which associates with RNA polymerase II. DSIF works with NELF to promote promoter-proximal pausing, stimulates mRNA capping and, after phosphorylation by P-TEFb, becomes a positive elongation factor, so it is central to research on transcription elongation.
| Target | Transcription elongation factor SPT5 (gene SUPT5H; UniProt O00267, human) |
|---|---|
| Clone | 25S69 |
| 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 | 121.0 kDa |
| Observed MW | 150 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 |
Samples with a confirmed band (WB): HepG2 cells.
Recommended loading (WB): 20–40 µg of total protein per lane.
Immunogen
Synthetic peptide based on the sequence of human SUPT5H.
Reactivity Notes
The supplier lists reactivity with human, mouse and rat. UniProt places transcription elongation factor SPT5 in the nucleus. Tissue expression noted by UniProt (human): Ubiquitously expressed. 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.
