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- Table of Contents
DUSP4 / Dual specificity protein phosphatase 4 · Western blot design guide
Design a Western Blot for DUSP4
Real validated DUSP4 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-DUSP4 WB antibodies. Everything you need to plan the experiment before you commit precious samples.
Evidence assembled September 2026 · For research use; verify linked source records and product datasheet before use
DUSP4 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 | ~43 kDa | |
| Gel | 12–15% (standard starting point) | |
| Negative control | Suggested KO / knockdown lysate |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Phosphorylated + Acetylated | |
| Caveat | Phosphorylation-state controls | |
| Gene-set association | MSigDB Hallmark membership | |
| Isoform | 2 isoform(s) |
Section 1
Real Curated DUSP4 Western Blot Protocols
The A03486 protocol combines labelled catalog values with standard starting conditions. Published comparisons retain their own sample, reagent and detection scope.
| Sample / lysate | HEPG2-UV cells (catalog A03486) |
| Gel % | 12–15% (standard starting point) |
| Load | 20–30 µg total protein per lane; optimize for abundance (standard starting point) |
| Transfer | Standard semi-dry transfer; verify efficiency (standard starting point) |
| Membrane | 0.45 µm PVDF (standard starting point) |
| Blocking | 5% milk or 5% BSA in TBST (standard starting point) |
| Primary antibody | A03486 · 1:1000 (catalog A03486) |
| Primary incubation | Overnight at 4 °C (standard starting point) |
| Secondary antibody | Species-matched HRP conjugate at validated dilution (standard starting point) |
| Secondary incubation | 1 h at room temperature (standard starting point) |
| Wash | 3 × 5 min in TBST (standard starting point) |
| Detection | ECL; bracket exposures to avoid saturation (standard starting point) |
Section 2
What Is the Expected DUSP4 Western Blot Band Size?
DUSP4 is predicted at 43 kDa; isoforms and modifications could affect migration, but no empirical band or visible shift is established.
| Single band near 43 kDa | consistent with the predicted size of DUSP4 |
| Several bands at different positions | could reflect isoforms 1 and 2; their migration is not established |
| Closely spaced bands near 43 kDa | could reflect phosphorylation at Ser386 or Ser391; a visible shift is not established |
| Weak band in whole-cell lysate, stronger in nuclear extract | consistent with DUSP4's nuclear localization |
💡Expected DUSP4 appearanceDUSP4 has a predicted mass of 43 kDa, but no empirical band size is supplied; confirm a band near that size with band-identity controls because isoform and modification effects on migration are unestablished.
| UniProt predicted mass | places the reference size near 43 kDa |
| Isoforms 1 and 2 | may differ in size, but their relative masses and migration are unspecified |
| Phosphoserine at Ser386 | may alter migration; no visible shift is established |
| Phosphoserine at Ser391 | may alter migration; no visible shift is established |
| N-acetylvaline at residue 2 | is documented, but no apparent size effect is established |
| Situation | Likely cause | Next action |
|---|---|---|
| No band in lysate | nuclear DUSP4 may be underrepresented in the sampled lysate | compare whole-cell lysate with a verified nuclear fraction |
| Band higher than expected | phosphorylation at Ser386 or Ser391 may affect migration, though a shift is unproven | compare phosphatase-treated and untreated samples and verify band identity |
| Band lower than expected | alternative splicing yields isoforms 1 and 2, whose sizes are unspecified | check band identity with an isoform-specific reference |
| Multiple bands | isoforms or phosphorylation may contribute, but distinct bands are unproven | compare isoform-specific references and phosphatase-treated samples |
| Weak or no signal | nuclear localization may limit DUSP4 in the tested fraction | test a verified nuclear extract alongside the lysate |
Experiment evidence
Western blot images showing DUSP4 band
A03486 · DUSP4
A03486 · DUSP4
A30480 · DUSP4
A30480 · DUSP4
A30480 · DUSP4
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for DUSP4 Western blot
🧪For positive controls for DUSP4 in Western blot, you can use no HPA-supported tissue or cell line because the supplied record has no expression data.
Positive control: No high/medium HPA tissue identified
Negative control: Suggested KO / knockdown lysate
Loading controls: Run GAPDH, β-actin, and a total-protein stain such as Ponceau alongside the samples.
⚠️Feasibility: HPA provides no tissue expression data here, so a suitable positive sample and a clean negative tissue cannot be confirmed.
HPA tissue expression evidence for DUSP4
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.
Higher expression tissues · candidate positive controls from IHC
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| No high/medium HPA tissues identified in the supplied evidence. | ||||
Lower expression tissues · IHC evidence, not confirmed WB-negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| No lower-expression tissue rows available in the supplied evidence. | ||||
Section 3
Advanced DUSP4 Western Blot Tips
Deeper troubleshooting and optimisation questions for DUSP4, answered from its protein features.
Where should the DUSP4 band appear?
Band shift · The supplied predicted mass is 43 kDa, but no observed band position is available. Use 43 kDa as a starting point for identifying a candidate band, not an exact migration requirement. The listed modifications alone do not establish a visible shift.
Could DUSP4 isoforms produce different bands?
Isoforms · Two isoforms are listed. In isoform 2, residues 1–53 are replaced and residues 54–144 are missing relative to the canonical sequence. This sequence difference could change migration, but the supplied features do not give an observed position for either isoform.
Check the antibody epitope against both sequences. An epitope within canonical residues 54–144 is absent from isoform 2; an epitope within residues 1–53 encounters a replacement sequence in isoform 2. An epitope in the shared region is more suitable for detecting both.
Check the antibody epitope against both sequences. An epitope within canonical residues 54–144 is absent from isoform 2; an epitope within residues 1–53 encounters a replacement sequence in isoform 2. An epitope in the shared region is more suitable for detecting both.
Which phosphorylation sites matter when interpreting DUSP4 bands?
PTM · UniProt lists MAPK-dependent phosphoserine at positions 386 and 391, using canonical sequence coordinates. These sites justify considering phosphorylation when interpreting bands, but their presence alone does not establish a visible mobility shift. Check the numbering convention before comparing them with antibody or paper site labels.
Does this guide establish induction of DUSP4?
Induction · No general induction response is established by this guide. A pathway or gene-set association is not evidence of induction in a particular specimen. Verify the relevant treatment and control in a target-specific experiment.
How should transfer be checked for DUSP4?
Transfer · Standard workflow guidance: verify transfer efficiency for the intended target size before interpreting a weak signal. Use total-protein assessment and optimize transfer for the membrane, gel and apparatus; the labelled catalog values take precedence.
How should blocking be optimized?
Blocking · Standard workflow guidance: follow the A03486 datasheet where specified. Otherwise compare 5% milk or 5% BSA in TBST; for a phospho-specific assay start with BSA. Optimize background and specific signal with matched controls.
Which sample fraction is relevant for DUSP4 quantitation?
Quantitation · DUSP4 is listed in the nucleus. When comparing samples, use a consistent fractionation method and compare equivalent fractions. If measuring both isoforms, confirm that the antibody recognizes a sequence shared by them; otherwise, band intensity may represent only one isoform.
Is DUSP4 N-terminally modified?
Interpretation · UniProt lists N-acetylvaline at canonical position 2. Account for this modification when interpreting N-terminal peptide or epitope measurements. The supplied evidence does not show that it produces a distinct Western blot band.
Compare candidate bands with the 43 kDa predicted mass, the two listed isoforms, and antibody epitope coverage. MAPK phosphorylation at canonical Ser386 and Ser391 is documented, but does not by itself explain a band shift. No glycosylation sites are listed, and no empirical band position is supplied, so these features cannot assign an unexpected band.
Compare candidate bands with the 43 kDa predicted mass, the two listed isoforms, and antibody epitope coverage. MAPK phosphorylation at canonical Ser386 and Ser391 is documented, but does not by itself explain a band shift. No glycosylation sites are listed, and no empirical band position is supplied, so these features cannot assign an unexpected band.
Boster reagents
DUSP4 Western Blot Antibodies
Catalog antibodies with Western blot application and product-specific WB images. Evaluate suitability with the reported sample, controls and experimental conditions.
Real WB data
Anti-MKP-2 DUSP4 Antibody
Cat # A03486
Real WB data
Anti-DUSP4 Antibody
Cat # A30480
A03486 and A30480 are listed for human, monkey, mouse, and rat DUSP4. Both have WB images described using HEPG2-UV cells at 1:1000; A03486 specifies a nuclear extract. These captions document specific test conditions, not validation across every listed species.
Which to pick: For nuclear extracts, A03486 has the closer documented WB example. A30480 also has a HEPG2-UV WB image at 1:1000. Both list the same species reactivity, so the supplied evidence gives no broader basis to prefer one.
Source: BosterBio DUSP4 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry Q13115.
- Human Protein Atlas. DUSP4 tissue expression.
- PMC11961949 — target-verified WB comparison
- PMC12621960 — target-verified WB comparison
- PMC7521518 — target-verified WB comparison