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DLX2 · Western blot design guide
Design a Western Blot for DLX2
Real validated DLX2 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-DLX2 WB antibodies. Everything you need to plan the experiment before you commit precious samples.
Last reviewed: May 2026 · Scientific review: Boster Bio technical team
DLX2 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 | ~34.2 kDa | |
| Observed band | 37 kDa | |
| Gel | 10–12% | |
| Negative control | siRNA / KO lysate |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Phosphorylated | |
| Caveat | Phosphorylation-induced mobility shift | |
| Regulation | LPS-induced | |
| Isoform | 2 isoform(s) |
Section 1
Real Curated DLX2 Western Blot Protocols
Literature-validated Western blot parameters for DLX2 — gel percentage, transfer, blocking, antibody incubation and detection, extracted from published methods.
| Sample / lysate | rat brain , Lane 2: mouse brain . 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-DLX2 antigen affinity purified polyclonal antibody (Catalog # A03617-2) 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 DLX2 at approximately 37 kDa. The expected band size for DLX2 is at 37 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 | 37 kDa |
Section 2
What Is the Expected DLX2 Western Blot Band Size?
DLX2 has a 34.2 kDa predicted backbone but typically runs around 37 kDa on Western blots, largely attributable to phosphorylation at Ser232.
| single band around 37 kDa | mature DLX2 running modestly above its 34.2 kDa predicted mass, consistent with phosphorylation at Ser232 |
| doublet or two closely spaced bands | reflects the two annotated DLX2 isoforms (1 and 2) generated by alternative splicing |
| band shifts down toward ~34 kDa after phosphatase treatment | loss of the Ser232 phosphate removes the mass contribution that pushes the native band above the predicted backbone |
| band strong in nuclear fraction but weak in cytoplasmic fraction | DLX2 is annotated as a nuclear protein, so it partitions into the nuclear extract rather than cytoplasmic lysate |
| no smearing and no higher-molecular-weight band under non-reducing conditions | DLX2 has no annotated glycosylation and no annotated disulfide bonds or homodimer formation |
💡Expected DLX2 appearanceFull-length DLX2 runs as a single band around 37 kDa on reducing SDS-PAGE, modestly above its 34.2 kDa predicted mass, consistent with phosphorylation at Ser232 and the absence of glycosylation or disulfide-linked oligomerization.
| Predicted mass (UniProt, 328 aa) | sets the 34.2 kDa theoretical baseline for unmodified DLX2 |
| Phosphorylation at Ser232 | adds apparent mass, contributing to the observed ~37 kDa band rather than the bare 34.2 kDa prediction |
| Alternative splicing (isoforms 1 and 2) | can produce two bands of differing apparent size, or a single band whose size depends on which isoform predominates, without a defined per-isoform kDa |
| No glycosylation annotated | rules out a smeared or diffusely higher band from carbohydrate modification |
| No disulfide bonds or homodimer annotated | rules out a band at roughly twice the monomer mass under non-reducing or incompletely reduced conditions |
| Nuclear subcellular localization | band strength depends on efficient nuclear lysis or fractionation, rather than whole-cell or cytoplasmic-only extraction |
| Situation | Likely cause | Next action |
|---|---|---|
| No band in lysate | DLX2 is a nuclear developmental transcription factor with restricted tissue expression, and standard whole-cell lysis may not efficiently release nuclear protein | use a nuclear extraction protocol and confirm sample source expresses DLX2, such as developing neural or branchial arch tissue |
| Band higher than expected | phosphorylation at Ser232 raises the apparent mass above the 34.2 kDa predicted mass to around 37 kDa | treat a lysate aliquot with phosphatase and compare mobility, and use 37 kDa as the reference size rather than the unmodified prediction |
| Band lower than expected | loss of the Ser232 phosphate during sample handling can shift the band down toward or below the 34.2 kDa predicted mass | include phosphatase inhibitors in the lysis buffer to preserve the native phosphorylated form |
| Multiple bands | the two annotated splice isoforms (1 and 2) can migrate as separate bands | confirm isoform identity with isoform-specific detection or transcript analysis rather than assuming nonspecific binding |
| Weak or no signal | DLX2 is a low-abundance nuclear transcription factor confined to developing tissues, so signal can be faint outside those contexts | increase protein loading, enrich for the nuclear fraction, and include a known DLX2-expressing tissue as a positive control |
Experiment evidence
Western blot images showing DLX2 band
A03617-2 · DLX2
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for DLX2 Western blot
🧪For positive controls for DLX2 in Western blot, you can use a DLX2-overexpressing cell line (e.g., HEK293T or HeLa cells transiently transfected with a DLX2 expression construct), since no Human Protein Atlas tissue or cell-line expression data is available for this protein.
Positive control: DLX2-transfected HEK293T cells
Negative control: empty-vector/non-transfected cells; confirm specificity with 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 normalize signal.
⚠️Feasibility: As a nuclear homeobox transcription factor with no HPA expression data to guide tissue selection, endogenous detection is unpredictable, so validate the antibody using an overexpression system paired with siRNA knockdown or a knockout line as the negative control.
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 DLX2 Western Blot Tips
Deeper troubleshooting and optimisation questions for DLX2, answered from its protein features.
Why does DLX2 migrate at 37 kDa instead of 34 kDa?
DLX2's predicted mass is 34.2 kDa, but it is annotated as a phosphoprotein; phosphorylation and the compact, basic homeodomain can retard mobility on SDS-PAGE, producing the commonly observed ~37 kDa band. This shift is expected and not indicative of a nonspecific band.
Do DLX2's two isoforms produce different band sizes?
UniProt lists two DLX2 isoforms (1 and 2) arising from alternative splicing. If your antibody epitope is shared, expect a possible doublet or a single dominant band depending on isoform expression in your tissue; confirm which isoform your antibody targets before assigning one expected size.
Could phosphorylation alter the DLX2 band pattern?
DLX2 carries one annotated modified residue and is classified as a phosphoprotein. Phosphorylation can cause a slight upward mobility shift or multiple closely spaced bands. Phosphatase treatment of lysates can help confirm whether extra bands reflect phosphorylation states rather than nonspecific binding.
What transfer method to use for DLX2 Western blot?
DLX2 is a ~34-37 kDa nuclear DNA-binding protein, so standard wet or semi-dry transfer at moderate voltage is sufficient; no extended transfer time is needed as for high-molecular-weight proteins. Ensure efficient lysis of nuclear compartments before loading, since DLX2 localizes to the nucleus.
How should unexpected extra bands be interpreted?
Bands near the 37 kDa main product may reflect the second DLX2 isoform or phosphorylated forms rather than nonspecific binding. Bands far from 34-37 kDa are more likely cross-reactivity; validate with knockdown or knockout controls, since DLX2 has no glycosylation or disulfide-linked variants to explain large shifts.
Is nuclear extraction needed for DLX2 quantitation?
Because DLX2 localizes to the nucleus as a transcription factor, whole-cell lysates may underrepresent signal; nuclear/cytoplasmic fractionation improves sensitivity and quantitation accuracy. Normalize to a nuclear loading control, such as histone or lamin, rather than a cytoplasmic housekeeping protein for accurate quantitation.
When is DLX2 expression induced in cells?
DLX2 is a developmental transcription factor linked to differentiation; it interacts with POU4F2 to enhance retinal ganglion cell differentiation. Expression is expected to rise during neural or retinal differentiation protocols rather than under stress induction, so use differentiating cell models as positive controls.
Boster reagents
Best DLX2 Western Blot Antibodies
BosterBio's DLX2 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-DLX2 Antibody Picoband®
Cat # A03617-2
Our recommended anti-DLX2 antibodies are top-performing reagents, extensively cited across the literature and rigorously validated through orthogonal methods, including comparison against negative-control tissues and complementary techniques, ensuring reliable, reproducible specificity for confident Western blot detection of DLX2.
Which to pick: Only one DLX2 antibody is catalogued here, A03617-2, which includes an actual Western blot validation image showing detection of DLX2 by SDS-PAGE, making it the clear, and only, choice for your Western blot experiments.
Source: BosterBio DLX2 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry Q07687.
- Human Protein Atlas. DLX2 tissue expression.