WNT3 / Proto-oncogene Wnt-3 · Western blot design guide

Design a Western Blot for WNT3

Real validated WNT3 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-WNT3 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

Western blot protocol sheet for WNT3: expected band ~39.6 kDa, hero antibody PB9619, catalog values and labelled standard workflow; separate PMC comparisons on the guide — Printable **WNT3** Western blot protocol sheet — expected band ~39.6 kDa, antibody PB9619, controls and PMC citations. Open the full WNT3 WB guide →

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WNT3 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	~39.6 kDa
	Observed band	~45 kDa
	Gel	5–20% (catalog PB9619)
	Negative control ⓘ	Suggested KO / knockdown lysate

Important caveats

Reasons your observed band may differ from the expected size.

	PTM	Glycosylated + Cleaved
	Caveat	Glycosylation-state controls
	Gene-set association	MSigDB C7 membership
	Isoform	1 isoform(s)

Section 1

Real Curated WNT3 Western Blot Protocols

The PB9619 protocol combines labelled catalog values with standard starting conditions. Published comparisons retain their own sample, reagent and detection scope.

Recommended Western blot protocol parameters
Sample / lysate	Human Placenta at 50ug, HEPG2 at 40ug (catalog PB9619)
Gel %	5–20% (catalog PB9619)
Load	20–30 µg total protein per lane; optimize for abundance (standard starting point)
Transfer	a nitrocellulose membrane at 150 mA for 50-90 minutes (catalog PB9619)
Membrane	nitrocellulose membrane (catalog PB9619)
Blocking	5% non-fat milk/TBS for 1.5 hour at RT (catalog PB9619)
Primary antibody	PB9619 · 0.5 μg/mL (catalog PB9619)
Primary incubation	overnight at 4°C (catalog PB9619)
Secondary antibody	goat anti-rabbit IgG-HRP, 1:5000 (catalog PB9619)
Secondary incubation	1.5 hour at RT (catalog PB9619)
Wash	TBS-0.1%Tween 3 times with 5 minutes each (catalog PB9619)
Detection	ECL (catalog PB9619)

Section 2

What Is the Expected WNT3 Western Blot Band Size?

WNT3 has a predicted 39.6 kDa precursor and an observed ~45 kDa band; the cause of their difference is not established.

What am I looking at on my blot?
Band at ~45 kDa	Empirical WNT3 band; confirm identity with an independent antibody or WNT3 depletion
Band below the precursor position	Could reflect cleavage of the 1–21 signal peptide
Little or no band in whole-cell lysate	WNT3 is secreted into extracellular space and matrix
Broader band near ~45 kDa	Variable N-linked glycosylation is possible but unconfirmed as the cause

💡Expected WNT3 appearanceUniProt predicts a 39.6 kDa precursor, while antibody QC shows a ~45 kDa band; the cause of the difference is unestablished, so confirm band identity with WNT3 depletion or an independent antibody.

How each factor affects band size
39.6 kDa UniProt precursor mass	Reference mass for the empirically observed ~45 kDa band; the migration difference is unexplained
N-linked glycosylation at Asn90	Could alter apparent mass; its contribution to the ~45 kDa band is unmeasured
N-linked glycosylation at Asn301	Could alter apparent mass; its contribution to the ~45 kDa band is unmeasured
Signal peptide at residues 1–21	Cleavage makes mature WNT3 shorter than its precursor; the migration effect is unmeasured

Why is my band missing or off?
Situation	Likely cause	Next action
No band in lysate	WNT3 is secreted and can reside in extracellular matrix	Check conditioned medium or extracellular matrix alongside lysate
Band higher than expected	N-linked glycosylation may affect migration, but its contribution is unconfirmed	Compare treated and untreated samples after N-glycan removal; verify WNT3 identity
Band lower than expected	Signal-peptide cleavage could shorten the precursor	Check antibody epitope coverage and confirm identity with WNT3 depletion
Broad smear instead of sharp band	Variable glycosylation is possible at Asn90 and Asn301	Compare treated and untreated samples after N-glycan removal
Multiple bands	Different glycosylation or signal-peptide processing states are possible but unproven	Compare glycan-treated samples and confirm bands with WNT3 depletion
Weak or no signal	Secreted WNT3 may be scarce in the sampled cell fraction	Test conditioned medium or extracellular matrix and include a positive control

Source: UniProt P56703 Human Protein Atlas product datasheet (PB9619)

Experiment evidence

Western blot images showing WNT3 band

PB9619 · WNT3

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Real WB data behind the band-size expectations in this section.

Sample controls for WNT3 Western blot

🧪For positive controls for WNT3 in Western blot, you can use independently validated WNT3-positive conditioned medium; no HPA positive tissue or cell was supplied.

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 alongside the samples.

⚠️Feasibility: WNT3 is secreted, so whole-cell lysate may give little signal, and HPA supplies no tissue controls.

HPA tissue expression evidence for WNT3

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 WNT3 Western Blot Tips

Deeper troubleshooting and optimisation questions for WNT3, answered from its protein features.

How should WNT3 band migration be interpreted?

Band shift · Use the separately labelled calculated mass and catalog-observed evidence above. A sequence annotation does not establish an observed migration shift. Verify target identity with orthogonal controls.

Should multiple WNT3 bands be assigned to splice isoforms?

Isoforms · The supplied UniProt record lists one isoform and no alternative sequence. Do not assign additional bands to named WNT3 isoforms on this evidence alone; verify their identity experimentally.

Which glycosylation sites matter when interpreting WNT3 bands?

PTM · UniProt lists N-linked glycosylation at Asn90 and Asn301. Use those UniProt coordinates when comparing site-specific experiments; antibody or paper numbering may use another convention. The listed sites do not, by themselves, establish a visible band shift.

Does this guide establish induction of WNT3?

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 WNT3?

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 PB9619 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.

Where should WNT3 be sampled for Western blot quantitation?

Quantitation · WNT3 is listed as secreted and located in extracellular space and extracellular matrix. Define the sample fraction before comparing abundance: a cell lysate may not capture the same WNT3 pool as extracellular material. Keep fraction collection consistent across samples.

Why might WNT3 appear near 45 kDa instead of 39.6 kDa?

Interpretation · The supplied apparent band is ~45 kDa, while the predicted mass is 39.6 kDa. WNT3 has N-linked glycosylation sites at UniProt Asn90 and Asn301 and a signal peptide at residues 1–21. These features warrant checking processing and glycosylation, but their presence alone does not establish the cause of the mass difference.

WNT3 has a signal peptide at UniProt residues 1–21 and is secreted. Consider whether a sample contains a precursor or a processed protein when interpreting bands. The supplied features do not give separate apparent masses for those forms.

UniProt lists 11 disulfide bonds in WNT3. If band patterns differ between reducing and nonreducing preparations, document the preparation conditions and verify band identity. The disulfide count alone does not predict a particular shift.

WNT3 forms a soluble 1:1 complex with AFM that prevents oligomerization. A higher band should not automatically be called a WNT3 oligomer or an AFM complex; assess whether the preparation preserves complexes and verify what the band contains.

Boster reagents

WNT3 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

Western blot analysis of WNT3 using anti-WNT3 antibody (PB9619). Electrophoresis was performed on a 5-20% SDS-PAGE gel at 70V (Stacking gel) / 90V (Resolving gel) for 2-3 hours. Lane 1: Human Placenta Tissue Lysate at 50ug, Lane 2: HEPG2 Whole Cell Lysate at 40ug. 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-WNT3 antigen affinity purified polyclonal antibody (Catalog # PB9619) 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 WNT3 at approximately 45 kDa. The expected band size for WNT3 is at 45 kDa.

Anti-Wnt3 Antibody Picoband®

Cat # PB9619

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PB9619 is a human-reactive anti-WNT3 antibody with a Western blot image showing an approximately 45 kDa band in human placenta tissue and HEPG2 cell lysates. The supplied evidence does not establish performance in other samples or independent validation.

Which to pick: PB9619 is the only listed WNT3 antibody. Its Western blot image uses human placenta tissue and HEPG2 cell lysates, making it the documented choice for those tested contexts.

Source: BosterBio WNT3 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.

References

UniProt Consortium. UniProt entry P56703.
Human Protein Atlas. WNT3 tissue expression.
PMC6779829 — target-verified WB comparison
PMC4930241 — target-verified WB comparison
PMC11071218 — target-verified WB comparison