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- Table of Contents
DUOX2 · Western blot design guide
Design a Western Blot for DUOX2
Real validated DUOX2 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-DUOX2 WB antibodies. Everything you need to plan the experiment before you commit precious samples.
Last reviewed: May 2026 · Scientific review: Boster Bio technical team
DUOX2 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 | ~175.4 kDa | |
| Observed band | ~175 kDa | |
| Gel | 4–12% gradient | |
| Negative control | siRNA / KO lysate |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Glycosylated + Cleaved | |
| Caveat | Heavy glycosylation | |
| Regulation | IFN-γ-suppressed | |
| Isoform | 1 isoform(s) |
Section 1
Real Curated DUOX2 Western Blot Protocols
Literature-validated Western blot parameters for DUOX2 — gel percentage, transfer, blocking, antibody incubation and detection, extracted from published methods.
| Sample / lysate | rat liver , Lane 2: mouse liver . 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-Duox2 antigen affinity purified polyclonal antibody (Catalog # A02186) 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 Duox2 at approximately 175 kDa. The expected band size for Duox2 is at 175 kDa |
| Gel % | 4–12% gradient |
| 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 | 175 kDa |
Section 2
What Is the Expected DUOX2 Western Blot Band Size?
DUOX2 has a 175.4 kDa predicted mass and runs at nearly the same ~175 kDa observed size under reducing conditions, since its glycosylation adds only modest mass to this large monomer.
| single band around 175 kDa | matches the predicted DUOX2 monomer mass, consistent with a reduced, non-complexed protein |
| band running slightly higher than 175 kDa or appearing diffuse | reflects added carbohydrate mass from N-linked glycosylation at up to five sites |
| high-molecular-weight band or material retained near the top of the gel under non-reducing conditions | DUOX2 stays disulfide-linked to its obligate partner DUOXA2, producing a heterodimeric complex above the monomer size |
| band present only in membrane-enriched lysate, weak or absent in soluble/cytosolic fractions | consistent with DUOX2 being a multi-pass apical membrane and cell-junction protein rather than a cytosolic species |
| doublet or closely spaced bands near 175 kDa | can reflect partial versus fuller occupancy of the five N-glycosylation sites rather than separate isoforms, since only one isoform is annotated |
💡Expected DUOX2 appearanceUnder standard reducing SDS-PAGE, DUOX2 should appear as a single band at approximately 175 kDa, matching its predicted monomeric mass despite carrying five N-glycosylation sites.
| Predicted DUOX2 monomer mass (175.4 kDa) | sets the baseline size expected for the mature reduced backbone |
| Five N-linked glycosylation sites (Asn100, 348, 382, 455, 537) | add variable carbohydrate mass that can shift the band modestly above predicted and broaden it into a less sharp band |
| Disulfide-linked heterodimer with DUOXA2 | under non-reducing or incompletely reducing conditions traps DUOX2 in a high-molecular-weight complex running well above the ~175 kDa monomer |
| N-terminal signal peptide (residues 1-25) | is cleaved from the mature protein, so the processed membrane-inserted form runs slightly below any unprocessed precursor |
| Multi-pass apical membrane and cell-junction localization | makes band intensity sensitive to how completely the membrane fraction is solubilized during lysis, though it does not itself change the apparent size |
| Situation | Likely cause | Next action |
|---|---|---|
| Band higher than expected | residual disulfide linkage to DUOXA2 persists because reduction of the sample was incomplete | increase reducing agent (DTT or beta-mercaptoethanol) concentration and extend sample boiling before loading |
| Broad smear instead of sharp band | heterogeneous occupancy and processing across the five N-glycosylation sites | treat lysate with PNGase F to collapse glycoforms and compare against the untreated smear |
| Weak or no signal | DUOX2 is a large multi-pass membrane protein embedded in the apical membrane and cell junctions, which resists standard lysis | use a stronger membrane-solubilizing detergent with extended incubation and load additional total protein |
| No band in lysate | the lysate lacks sufficient apical membrane content since DUOX2 is membrane-restricted rather than cytosolic | prepare a membrane-enriched fraction, ideally from apical epithelial membranes, instead of whole soluble lysate |
| Fragments below expected size | proteolytic degradation of this large 175 kDa multi-pass membrane protein during extended lysis or handling | add protease inhibitors and keep all samples cold throughout lysis and processing |
| Multiple bands | partial glycosylation across the five annotated sites produces a small number of discrete mass populations alongside the main species | run parallel PNGase F/Endo H-treated and untreated lanes to confirm which bands are glycosylation-dependent |
Experiment evidence
Western blot images showing DUOX2 band
A02186 · DUOX2
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for DUOX2 Western blot
🧪For positive controls for DUOX2 in Western blot, you can use a DUOX2-overexpressing cell line (e.g., transiently transfected HEK293 cells), since no Human Protein Atlas tissue or cell line data confirm a native high-expressing source for this protein.
Positive control: Transfected HEK293 cells (DUOX2 overexpression)
Negative control: ubiquitously expressed; use siRNA knockdown or KO line
Loading controls: Run GAPDH and β-actin as loading controls alongside a total-protein stain (e.g., stain-free gel, Ponceau S, or REVERT) to confirm even transfer and loading.
⚠️Feasibility: As a low-abundance, multi-pass apical membrane protein with no HPA expression data to guide tissue selection, endogenous DUOX2 signal may be weak, so membrane-enriched fractions and an overexpression or siRNA/KO system are recommended 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 DUOX2 Western Blot Tips
Deeper troubleshooting and optimisation questions for DUOX2, answered from its protein features.
Why does DUOX2's band match its predicted 175 kDa mass?
DUOX2 has no propeptide processing and only one isoform, so the mature protein retains nearly its full predicted length. The signal peptide (residues 1-25) is cleaved but this 25-residue loss is offset by five N-glycosylation sites adding mass, keeping the observed ~175 kDa band close to the calculated 175.4 kDa mass.
Is DUOX2 expression induced by TSH signaling?
DUOX2 functions in thyroid hormone biosynthesis at the apical membrane of thyrocytes, where H2O2 generation is coupled to TPO-catalyzed iodination. TSH-driven cAMP signaling upregulates thyroid H2O2-generating machinery, so blots from TSH-stimulated or hypothyroid-model thyroid tissue may show higher DUOX2 signal than unstimulated tissue.
How should blocking be optimized for glycosylated DUOX2?
DUOX2 carries five N-glycosylation sites, so milk-based blockers containing glycoproteins and lectin-like components can raise background via carbohydrate cross-reactivity. Use BSA-based blocking buffer instead of non-fat milk, and validate with a no-primary control to confirm the ~175 kDa band is specific.
What transfer method to use for DUOX2 Western blot?
DUOX2 is a large (175 kDa) multi-pass transmembrane glycoprotein, so use wet tank transfer with reduced methanol (or methanol-free buffer) and extended transfer time at low voltage/overnight at 4C to fully elute it from the gel. PVDF membrane is preferred over nitrocellulose for retaining high-molecular-weight membrane proteins.
How to accurately quantify apical-membrane DUOX2 signal?
Because DUOX2 localizes to the apical membrane and cell junctions, normalize to a membrane-associated loading control (e.g., Na+/K+-ATPase) rather than a cytosolic control like GAPDH when using membrane-enriched fractions, since total lysate GAPDH normalization can misrepresent relative membrane protein abundance.
Why might DUOX2 blots show extra high-molecular-weight bands?
DUOX2 forms a disulfide-linked heterodimer with DUOXA2 and has three disulfide bonds; under non-reducing or incompletely reduced conditions, a higher-molecular-weight DUOX2-DUOXA2 complex can appear above the 175 kDa monomer. Always run under fully reducing conditions (fresh DTT/BME) and confirm complete sample reduction to isolate the monomeric band.
Could glycosylation cause DUOX2 band smearing?
With five predicted N-glycosylation sites, heterogeneous glycan occupancy can produce a diffuse or slightly smeared band around 175 kDa rather than a sharp line. This is expected for a glycoprotein and does not indicate degradation; PNGase F treatment can be used to collapse the smear and confirm the glycosylated identity.
Boster reagents
Best DUOX2 Western Blot Antibodies
BosterBio's DUOX2 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-Duox2 Antibody Picoband®
Cat # A02186
Boster's anti-DUOX2 antibody is a top-performing, extensively cited reagent, rigorously validated by Western blot and cross-confirmed against negative-control tissues and complementary detection methods for reliable, specific DUOX2 detection in your samples.
Which to pick: Only one Boster anti-DUOX2 antibody is catalogued here, A02186, which includes an actual Western blot validation image—making it the clear, and only, choice for your DUOX2 WB experiments.
Source: BosterBio DUOX2 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry Q9NRD8.
- Human Protein Atlas. DUOX2 tissue expression.