| Field | Specification |
|---|---|
| Mfr No | |
| Clonality | |
| Concentration | |
| Conjugate | |
| Host | |
| Immunogen | Synthesized peptide derived from human p70 S6 kinase α around the phosphorylation site of Ser418 |
| Isotype | |
| Product Type | |
| Shipping | |
| Storage | |
| UniProt # |
Product Overview
P70 S6 Kinase alpha is a member of the RSK (ribosomal S6 kinase) family of serine/threonine kinases and contains 2 non-identical kinase catalytic domains. It phosphorylates several residues of the S6 ribosomal protein. The kinase activity of this protein is activated by serine/threonine phosphorylation and protein kinase C and inactivated by type 2A phosphatase. Activation leads to an increase in protein synthesis and cell proliferation. Overexpression of this kinase is involved in some breast cancer cell lines. Alternate translational start sites have been described and alternate transcriptional splice variants have been observed but have not been thoroughly characterized.
Validated Applications & Recommended Dilutions
| Application | Recommended Dilution |
|---|---|
| WB | 1:500-1:2000 |
| IHC | 1:100-1:300 |
| IF | 1:200-1:1000 |
Antibody Specifications
| Target | p70 S6 kinase α (phospho Ser418) |
|---|---|
| Host Species | Rabbit |
| Clonality | Polyclonal |
| Isotype | IgG |
| Conjugate | Unconjugated |
| Purification | Affinity Purification |
| Concentration | 1 mg/mL |
| Molecular Weight | Calculated 59kDa; Observed 60kDa |
Immunogen
Synthesized peptide derived from human p70 S6 kinase α around the phosphorylation site of Ser418 UniProt: P23443.
Species Reactivity & Cross-Reactivity
Validated for: Human, Mouse, Rat. Verify suitability in your sample type prior to use. For species or applications not listed in the datasheet, consult our technical team before purchase.
Storage & Handling
Store at -20℃ Valid for 12 months. Avoid freeze / thaw cycles.
Storage Buffer: PBS with 0.02% sodium azide, 0.5% protective protein and 50% glycerol, pH7.4
Related Products
Browse additional antibodies targeting p70 S6 kinase α (phospho Ser418) and complementary reagents — including secondary antibodies, blocking buffers, and detection kits — available through BioHippo.
The recommended starting dilution for Western Blot is WB 1:500-1:2000;IHC 1:100-1:300;IF 1:200-1:1000. Optimal dilution should be determined empirically for each laboratory setup, sample type, and detection system. Use freshly prepared lysates with protease inhibitors; add phosphatase inhibitors if studying phosphorylation-dependent forms of p70 S6 kinase α (phospho Ser418). Expected band size: Calculated 59kDa, Observed 60kDa. If background is high, increase blocking (5% non-fat milk or BSA in TBST) and/or increase wash stringency.
For IHC-P, heat-induced epitope retrieval (HIER) is typically required. Recommended starting conditions: citrate buffer pH 6.0 (microwave or pressure cooker, ~20 min) for rodent samples; EDTA buffer pH 9.0 for human clinical samples. After retrieval, allow sections to cool gradually before proceeding to blocking. Include a p70 S6 kinase α (phospho Ser418)-positive tissue control (confirmed by literature or database expression data) and a negative isotype control in every run. Recommended dilution: WB 1:500-1:2000;IHC 1:100-1:300;IF 1:200-1:1000. Refer to the product datasheet for any target-specific retrieval guidance.
For intracellular targets including most nuclear and cytoplasmic proteins, fix cells with 4% paraformaldehyde (15 min, room temperature) followed by permeabilization with 0.1–0.2% Triton X-100 or saponin (5–10 min). For surface membrane targets, fixation without permeabilization may be sufficient. Block with 5–10% normal serum (matching the secondary antibody host species) for 30–60 min. Incubate primary antibody at the recommended dilution (WB 1:500-1:2000;IHC 1:100-1:300;IF 1:200-1:1000) at 4°C overnight or 1–2 h at room temperature. Confirm nuclear/cytoplasmic localization of p70 S6 kinase α (phospho Ser418) against published protein databases before designing your protocol.
This antibody has been experimentally validated in: Human, Mouse, Rat. Cross-reactivity with other species has not been systematically evaluated. If your sample species is not listed, assess immunogen sequence homology to your target species ortholog. The immunogen used is: "Synthesized peptide derived from human p70 S6 kinase α around the phosphorylation site of Ser418" — higher sequence identity between species increases the probability of cross-reactivity, but experimental validation with appropriate controls is necessary before drawing scientific conclusions.
Store at -20℃ Valid for 12 months. Avoid freeze / thaw cycles. Storage Buffer: PBS with 0.02% sodium azide, 0.5% protective protein and 50% glycerol, pH7.4. To maintain antibody activity, avoid repeated freeze-thaw cycles. Aliquot into single-use volumes before first freeze. If working with the antibody frequently, keep a working stock at 4°C for up to 4 weeks — add 0.02% sodium azide to the working stock as a bacteriostatic agent if azide is not already present in the buffer. Monitor performance against a validated positive control when transitioning between storage aliquots or lots.
Polyclonal antibodies are produced from immunized animals and may exhibit some degree of lot-to-lot variation in titer, background, and sensitivity. Each production lot is tested for performance against established acceptance criteria. When transitioning to a new lot, run a side-by-side pilot comparison against your previous lot using a validated positive control sample before updating your standard protocol. If significant performance differences are observed, contact our technical support team — titer adjustments may resolve the issue in most cases.
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.
