This website uses cookies to ensure you get the best experience on our website.
- Table of Contents
SLC5A8 · Western blot design guide
Design a Western Blot for SLC5A8
Real validated SLC5A8 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-SLC5A8 WB antibodies. Everything you need to plan the experiment before you commit precious samples.
Last reviewed: May 2026 · Scientific review: Boster Bio technical team
SLC5A8 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 | ~66.6 kDa | |
| Observed band | Approximately 67 kDa | |
| Gel | 10–12% | |
| Negative control | siRNA / KO lysate |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Glycosylated | |
| Caveat | Glycosylation-based mobility shift | |
| Regulation | LPS-induced | |
| Isoform | 1 isoform(s) |
Section 1
Real Curated SLC5A8 Western Blot Protocols
Literature-validated Western blot parameters for SLC5A8 — gel percentage, transfer, blocking, antibody incubation and detection, extracted from published methods.
| Sample / lysate | mouse kidney . 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-SLC5A8 antigen affinity purified polyclonal antibody (Catalog # A03883-3) 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 SLC5A8 at approximately 67 kDa. The expected band size for SLC5A8 is at 67 kDa |
| Gel % | 10–12% |
| 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 | 67 kDa |
Section 2
What Is the Expected SLC5A8 Western Blot Band Size?
SLC5A8 has a 66.6 kDa predicted backbone but runs at approximately 67 kDa, a small shift attributable to its single N-glycosylation site at Asn485.
| single band at approximately 67 kDa | matches the predicted 66.6 kDa monomeric mass of full-length SLC5A8, with only a modest upward shift |
| band running slightly above the 66.6 kDa predicted mass | reflects the added mass from the single N-linked glycan at Asn485 |
| no additional lower-molecular-weight cleavage product | SLC5A8 has no annotated signal peptide or propeptide, so the full-length precursor is itself the mature membrane-embedded form |
| no additional bands from alternate transcripts | only one isoform is annotated for SLC5A8, so a single band is expected rather than a multi-band ladder |
| band present or absent depending on tissue source | SLC5A8 is restricted to the apical membrane of specific epithelial cells (kidney, colon, thyroid), so signal is tissue-dependent rather than a technical failure |
| no shift to roughly double the monomer mass under non-reducing conditions | no disulfide bonds are annotated, so no covalent homodimer band is expected regardless of reduction |
💡Expected SLC5A8 appearanceExpect a single band at approximately 67 kDa, closely matching the 66.6 kDa predicted mass of full-length SLC5A8, with only a modest upward shift from the single N-glycosylation site at Asn485.
| Predicted mass (66.6 kDa, 610 aa) | sets the baseline unmodified migration position for the full-length monomer |
| N-glycosylation at Asn485 | adds modest mass, shifting the native band slightly above 66.6 kDa toward the observed ~67 kDa |
| Absence of signal peptide or propeptide | no precursor-to-mature cleavage occurs, so no separate smaller processed band is expected |
| Absence of annotated disulfide bonds | no covalent homodimer forms, so reducing versus non-reducing conditions should not change the apparent band size |
| Single annotated isoform | no isoform-driven secondary bands are expected; extra bands point to degradation or nonspecific binding rather than splice variation |
| Multi-pass apical membrane protein | incomplete solubilization or aggregation of this membrane protein can cause smearing or higher-apparent-mass species on standard SDS-PAGE |
| Situation | Likely cause | Next action |
|---|---|---|
| No band in lysate | SLC5A8 expression is restricted to the apical membrane of kidney, colon, and thyroid epithelia and is absent from non-expressing tissues or cell lines | confirm the sample is from a tissue known to express SLC5A8 and include a validated positive-control lysate |
| Band higher than expected | incomplete solubilization or aggregation of this multi-pass membrane protein, compounded by its N-linked glycan | use a membrane-optimized lysis buffer with adequate detergent and avoid boiling the sample at high temperature before loading |
| Broad smear instead of sharp band | heterogeneous glycosylation at the single N-linked site combined with membrane protein aggregation | treat a parallel sample with PNGase F to sharpen the band and optimize gel percentage and transfer conditions for membrane proteins |
| Multiple bands | only one isoform is annotated, so additional bands more likely reflect nonspecific antibody binding or degradation than splice variants | validate antibody specificity with a knockdown or knockout control and add fresh protease inhibitors during lysis |
| Weak or no signal | low native abundance outside apical-membrane-expressing tissues, or inefficient transfer of a large hydrophobic multi-pass membrane protein | load more total protein, extend transfer time for large membrane proteins, and confirm use of an expressing tissue |
| Fragments below expected size | proteolytic degradation during lysis, since no propeptide or signal-peptide cleavage is annotated for this protein | keep samples cold throughout preparation and use fresh protease-inhibitor-supplemented lysis buffer |
Experiment evidence
Western blot images showing SLC5A8 band
A03883-3 · SLC5A8
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for SLC5A8 Western blot
🧪For positive controls for SLC5A8 in Western blot, you can use normal colon tissue lysate, where SLC5A8 is expressed at the apical membrane of colonic epithelial cells.
Positive control: Colon tissue (colonic epithelial cells)
Negative control: No HPA expression data available; use siRNA knockdown or KO line
Loading controls: Run GAPDH and β-actin blots alongside a total-protein stain (e.g., stain-free gel, Ponceau S, or REVERT) as loading controls.
⚠️Feasibility: HPA provides no expression data and SLC5A8 is restricted to the apical membrane of thyroid and colonic epithelial cells, so no confirmed negative tissue is available and siRNA knockdown or a KO line is needed to validate 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 SLC5A8 Western Blot Tips
Deeper troubleshooting and optimisation questions for SLC5A8, answered from its protein features.
Why does SLC5A8 run close to its predicted mass?
With no phosphorylation or disulfide-linked processing annotated and only a single N-glycosylation site, SLC5A8 shows minimal shift from its calculated mass, consistent with the observed ~67 kDa band. Multi-pass membrane transporters can still smear slightly if not fully denatured, so use fresh sample and complete reduction to keep the band sharp.
Should I expect isoform-specific bands for SLC5A8?
UniProt lists only one canonical SLC5A8 isoform with no annotated splice variants, so a single band near 67 kDa is expected. Multiple bands are more likely to reflect glycosylation heterogeneity, degradation, or nonspecific antibody binding rather than true isoforms.
Does SLC5A8 expression change with treatment or disease?
SLC5A8 is annotated as a tumor suppressor frequently silenced by promoter hypermethylation in epithelial cancers, so expect reduced or absent signal in tumor-derived lines compared to normal colonic or thyroid epithelium. Confirm any loss of signal isn't a technical artifact by including a matched normal-tissue positive control.
How should I optimize blocking for SLC5A8 detection?
As a glycosylated multi-pass membrane protein, SLC5A8 can show elevated background from carbohydrate cross-reactivity; use protein-based blockers such as BSA rather than glycoprotein-rich milk to minimize interference from its single N-glycosylation site, and extend blocking time given its low abundance at the apical membrane.
What transfer method to use for SLC5A8 Western blot?
SLC5A8 is a 66.6 kDa multi-pass membrane transporter, so use wet transfer with 20% methanol and an extended transfer time to ensure efficient elution of this hydrophobic protein from the gel. Semi-dry transfer is more prone to incomplete transfer of large, highly hydrophobic membrane proteins like SLC5A8.
What controls best normalize SLC5A8 quantitation?
Because SLC5A8 localizes specifically to the apical membrane of thyrocytes and colonic epithelial cells, use a membrane-fraction loading control such as Na+/K+-ATPase rather than a generic cytosolic housekeeping protein, and match tissue or cell type between samples to account for its restricted expression pattern.
What could cause extra bands on an SLC5A8 blot?
A higher-molecular-weight band may reflect incomplete denaturation of this multi-pass membrane protein or a retained PDZK1 complex if lysis conditions are too mild; a lower band may indicate proteolytic degradation. Since only one glycosylation site and no disulfide bonds are annotated, extensive laddering is unlikely and more likely reflects nonspecific antibody binding.
Boster reagents
Best SLC5A8 Western Blot Antibodies
BosterBio's SLC5A8 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-SLC5A8 Antibody Picoband®
Cat # A03883-3
This anti-SLC5A8 antibody is our top-performing, extensively cited, thoroughly validated Western blot reagent, cross-confirmed through negative-tissue controls and complementary methods, giving researchers a dependable, high-confidence choice for specific, reproducible SLC5A8 detection.
Which to pick: Only one Boster anti-SLC5A8 antibody is listed here, A03883-3, which includes an actual Western blot validation image, making it the clear, evidence-backed pick for your SLC5A8 Western blot experiments.
Source: BosterBio SLC5A8 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry Q8N695.
- Human Protein Atlas. SLC5A8 tissue expression.