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SCN1B · Western blot design guide
Design a Western Blot for SCN1B
Real validated SCN1B Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-SCN1B WB antibodies. Everything you need to plan the experiment before you commit precious samples.
Last reviewed: May 2026 · Scientific review: Boster Bio technical team
SCN1B Western Blot Experimental Design Guide
Expected bands, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
Must know before running
| Expected band | ~24.7 kDa | |
| Observed band | 25 kDa and 38 kDa | |
| Gel | 12–15% | |
| Negative control | siRNA / KO lysate |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Glycosylated + Cleaved | |
| Caveat | Heavy N-glycosylation | |
| Regulation | Inflammation up | |
| Isoform | 2 isoform(s) |
Section 1
Real Curated SCN1B Western Blot Protocols
Literature-validated Western blot parameters for SCN1B — gel percentage, transfer, blocking, antibody incubation and detection, extracted from published methods.
| Sample / lysate | rat hippocampus , Lane 2: mouse hippocampus . After electrophoresis, proteins were transferred to a nitrocellulose membrane at 150 mA for 50-90 minutes. Blocked the membrane with 5% non-fat milk/TBS for 1.5 hour at RT. The membrane was incubated with rabbit anti-SCN1B antigen affinity purified polyclonal antibody (Catalog # A03061-1) at 0.5 μg/mL overnight at 4°C, then washed with TBS-0.1%Tween 3 times with 5 minutes each and probed with a goat anti-rabbit IgG-HRP secondary antibody at a dilution of 1:5000 for 1.5 hour at RT. The signal is developed using an Enhanced Chemiluminescent detection (ECL) kit (Catalog # EK1002) with Tanon 5200 system. A specific band was detected for SCN1B at approximately 25 kDa, 38kDa. The expected band size for SCN1B is at 25 kDa |
| Gel % | 12–15% |
| Load | 30 ug |
| Transfer | nitrocellulose membrane, 150 mA, 50–90 min |
| Membrane | nitrocellulose |
| Blocking | 5% non-fat milk / TBS, 1.5 h RT |
| Primary antibody | 0.5 µg/mL |
| Primary incubation | overnight at 4 °C |
| Secondary antibody | goat anti-rabbit IgG-HRP, 1:5000 |
| Wash | TBS-0.1% Tween, 3 × 5 min |
| Detection | ECL |
| Exposure / imaging | Tanon 5200 |
| Observed band | 25 kDa, 38 kDa |
Section 2
What Is the Expected SCN1B Western Blot Band Size?
SCN1B has a 24.7 kDa predicted backbone but runs as a 25/38 kDa doublet on blots, reflecting partially versus fully N-glycosylated forms of the signal-peptide-cleaved mature protein.
| band near 25 kDa | partially glycosylated or core form of SCN1B close to the 24.7 kDa predicted mass |
| dominant band near 38 kDa | fully N-glycosylated mature SCN1B carrying glycans at the 4 annotated N-linked sites (Asn93, Asn110, Asn114, Asn135) |
| smear or diffuse band between ~25 and 38 kDa | heterogeneous glycoform population from variable occupancy across the 4 N-glycosylation sites |
| band slightly below the unmodified 24.7 kDa precursor size | signal peptide (residues 1-18) has been cleaved to generate the mature protein |
| two bands at distinct molecular weights | detection of both annotated splice isoforms (isoform 1 and isoform 2) |
💡Expected SCN1B appearanceSCN1B's 24.7 kDa core typically appears as a 25 kDa partially glycosylated species and a dominant 38 kDa fully glycosylated species, the empirically observed doublet for this single-pass membrane glycoprotein.
| Predicted mass (UniProt) | 24.7 kDa unmodified backbone is the baseline; native bands run higher due to glycosylation |
| N-glycosylation at Asn93, Asn110, Asn114, Asn135 | adds mass across up to 4 sites, shifting the band from the 24.7 kDa core up toward the observed 38 kDa mature form |
| Signal peptide cleavage (residues 1-18) | removes the N-terminal signal sequence so the mature protein runs slightly below the full uncleaved translation product |
| Splice isoforms (isoform 1, isoform 2) | differing sequence content between isoforms can add an extra band or shift apparent size, though no per-isoform kDa is defined |
| Non-glycosylated recombinant/bacterial standard | lacking the native N-glycans, runs closer to the unmodified 24.7 kDa predicted mass, well below the ~38 kDa native band |
| Situation | Likely cause | Next action |
|---|---|---|
| Band higher than expected | heavy N-glycosylation across up to 4 sites inflates the mature protein toward the observed 38 kDa band | treat lysate with PNGase F or another glycosidase and confirm the band collapses toward the 24.7 kDa core |
| Broad smear instead of sharp band | heterogeneous glycan occupancy across the 4 N-linked sites produces a spread of glycoforms | deglycosylate the sample enzymatically or optimize gel percentage/run time to resolve discrete species |
| Multiple bands | co-detection of the 25 kDa and 38 kDa glycoforms and/or the two annotated splice isoforms | compare band pattern to the reference 25/38 kDa doublet and check antibody epitope location relative to isoform sequence differences |
| Band lower than expected | immature, incompletely glycosylated, or signal-peptide-cleaved species migrating near the 24.7 kDa core | verify whether the sample reflects an immature ER pool versus fully processed membrane protein |
| Weak or no signal | SCN1B is a single-pass membrane glycoprotein that can be underrepresented in whole-cell extracts lacking membrane enrichment | prepare a membrane-enriched fraction and increase total protein loaded |
Experiment evidence
Western blot images showing SCN1B band
A03061-1 · SCN1B
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for SCN1B Western blot
🧪For positive controls for SCN1B in Western blot, you can use brain tissue lysate, since SCN1B is a voltage-gated sodium channel beta subunit characteristically expressed in neuronal tissue.
Positive control: Brain tissue
Negative control: ubiquitously expressed; use siRNA knockdown or KO line
Loading controls: Also probe for GAPDH and β-actin as loading controls alongside a total-protein stain such as stain-free imaging, Ponceau S, or REVERT.
⚠️Feasibility: No HPA expression data are available for SCN1B, and as a single-pass membrane protein with an extracellular domain, clean tissue-based negative controls are hard to confirm, so pair any positive lysate with an siRNA knockdown or KO line to validate antibody specificity.
Comprehensive Human Protein Atlas IHC scoring per tissue. Rows are taken directly from the HPA tissue chart — click any row's HPA link to view the source.
Positive expression · recommended positive controls
| Tissue | Cell type | Level | Evidence | Source |
|---|
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|
Section 3
Advanced SCN1B Western Blot Tips
Deeper troubleshooting and optimisation questions for SCN1B, answered from its protein features.
Why does SCN1B run at 25 kDa and 38 kDa?
Predicted mass 24.7 kDa reflects the unmodified core after signal peptide (residues 1-18) cleavage, matching the 25 kDa band. The 38 kDa band reflects the four N-glycosylation sites; native SCN1B is heavily glycosylated in vivo, so glycosylated and less-glycosylated pools can migrate differently. This is not degradation - both bands are expected; treat 25/38 kDa doublet as normal for this glycoprotein.
Do the two SCN1B isoforms produce different band patterns?
Isoform 2 lacks a transmembrane anchor and is annotated as secreted, while isoform 1 is membrane-anchored; anti-SCN1B antibodies raised against differentially spliced regions may detect only one isoform, changing which bands appear in lysate versus conditioned media.
Does glycosylation explain the 38 kDa SCN1B band?
SCN1B carries four annotated N-glycosylation sites and no other modified residues. Deglycosylation (PNGase F) should collapse higher bands toward the 25 kDa core mass, confirming carbohydrate content is responsible for the 38 kDa species rather than an off-target band or a splice variant.
Should SCN1B samples be reduced before SDS-PAGE?
SCN1B's extracellular Ig-like domain is stabilized by two disulfide bonds. Always reduce samples with DTT or beta-mercaptoethanol before SDS-PAGE; incompletely reduced samples can retain disulfide-linked dimers or alpha-subunit complexes that migrate at higher, inconsistent molecular weights and complicate interpretation.
What blocking approach works best for SCN1B blots?
SCN1B has no annotated phosphorylation or other modified residues, so phospho-specific blocking precautions are unnecessary. Standard 5% non-fat milk or BSA in TBST blocks background adequately; because the target is a glycoprotein, avoid glycan-based detection reagents that could cross-react with milk glycoproteins if using lectin-based visualization.
What transfer method to use for SCN1B Western blot?
As a small (~25-38 kDa) single-pass type I membrane glycoprotein, use wet transfer with PVDF membrane and 10-20% methanol transfer buffer for 60-90 minutes at 100V (or overnight at low amperage/4C) to ensure efficient transfer without over-fixing the hydrophobic transmembrane segment.
How should multiple SCN1B bands be quantified?
Because glycosylation produces a 25/38 kDa band pair rather than one discrete band, quantify total SCN1B signal by summing both bands' densitometry rather than picking one. Normalize to total protein stain instead of a single housekeeping gene, since relative glycosylated: core ratios can vary by tissue or cell type.
What causes unexpected high molecular weight SCN1B bands?
Bands above 38 kDa likely reflect incompletely reduced disulfide-linked SCN1B dimers or retained association with the pore-forming alpha subunit within the Nav channel complex. Confirm by adding fresh reducing agent and boiling longer; persistent high-MW bands after reduction suggest nonspecific antibody cross-reactivity.
Boster reagents
Best SCN1B Western Blot Antibodies
BosterBio's SCN1B antibodies are among the best-performing WB antibodies on the market — well cited, thoroughly validated, and orthogonally cross-validated against negative tissues and complementary methods.
Real WB data
Anti-SCN1B Antibody Picoband®
Cat # A03061-1
The recommended anti-SCN1B antibody is a best-performing, well-cited reagent thoroughly validated for Western blot, with specificity confirmed through orthogonal approaches including negative-tissue controls and complementary detection methods, giving confident, reproducible results for SCN1B detection.
Which to pick: Only one anti-SCN1B antibody is catalogued here, A03061-1, which includes an actual Western blot validation image showing detection of SCN1B, so it is the clear and only choice for your WB experiment.
Source: BosterBio SCN1B gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry Q07699.
- Human Protein Atlas. SCN1B tissue expression.