FOXG1 / Forkhead box protein G1 · Western blot design guide

Design a Western Blot for FOXG1

Real validated FOXG1 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-FOXG1 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 FOXG1: expected band ~52.4 kDa, hero antibody A01852-1, catalog values and labelled standard workflow; separate PMC comparisons on the guide — Printable **FOXG1** Western blot protocol sheet — expected band ~52.4 kDa, antibody A01852-1, controls and PMC citations. Open the full FOXG1 WB guide →

Navigate to: Protocols Band Controls Antibodies

FOXG1 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	~52.4 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	—
	Caveat	—
	Gene-set association	MSigDB C7 membership
	Isoform	1 isoform(s)

Section 1

Real Curated FOXG1 Western Blot Protocols

The A01852-1 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	Target-positive lysate and matched negative control (standard starting point)
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	A01852-1; use the WB datasheet starting dilution (standard starting point)
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 FOXG1 Western Blot Band Size?

FOXG1 is predicted at 52.4 kDa; no empirical band size is supplied, and its annotated features do not demonstrate altered migration.

What am I looking at on my blot?
Single band near 52.4 kDa	Consistent with the predicted FOXG1 mass; band identity still needs confirmation
Band in mouse brain lysate	Consistent with the reported FOXG1 detection in that sample; its apparent mass was not supplied
Band enriched in a nuclear fraction	Consistent with FOXG1's annotated nuclear location
Band well above 52.4 kDa	Its identity or altered migration needs confirmation; no size-raising feature is annotated

💡Expected FOXG1 appearanceFOXG1 has a predicted mass of 52.4 kDa, but no empirical band size is supplied; use molecular weight markers and antibody specificity controls to assess a candidate band.

How each factor affects band size
Predicted molecular mass	Places the reference size at 52.4 kDa
489-residue sequence	Defines the full-length protein underlying the predicted mass
No annotated glycosylation sites	Provides no documented glycan-related size increase
No annotated signal peptide or propeptide	Provides no documented cleavage-related size decrease
One listed isoform	Provides no basis for predicting separate isoform bands

Why is my band missing or off?
Situation	Likely cause	Next action
No band in lysate	FOXG1 may be below detection in the sample	Check a mouse brain lysate positive control and enrich the nuclear fraction
Band higher than expected	No annotated feature establishes the size increase	Check the molecular weight marker and confirm band identity with FOXG1 depletion
Band lower than expected	No annotated processing event establishes a smaller product	Confirm band identity with FOXG1 depletion
Multiple bands	The single listed isoform does not explain distinct bands	Compare bands before and after FOXG1 depletion
Weak or no signal	Nuclear FOXG1 may be poorly represented in the tested extract	Check extraction and test a nuclear fraction alongside mouse brain lysate
Fragments below expected size	Possible sample degradation is not established by the supplied features	Prepare fresh lysate with protease inhibitors and confirm FOXG1 identity

Source: UniProt P55316 Human Protein Atlas product datasheet (A01852-1)

Experiment evidence

Western blot images showing FOXG1 band

A01852-1 · FOXG1

A01852-2 · FOXG1

A01852 · FOXG1

← swipe / scroll for more images →

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

Sample controls for FOXG1 Western blot

🧪For positive controls for FOXG1 in Western blot, you can use a verified FOXG1-positive sample; the supplied HPA data identify no positive tissue or cell.

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: HPA provides no tissue data, so neither a positive sample nor a clean negative tissue can be verified.

HPA tissue expression evidence for FOXG1

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 FOXG1 Western Blot Tips

Deeper troubleshooting and optimisation questions for FOXG1, answered from its protein features.

How should FOXG1 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.

Does FOXG1 have annotated isoforms that could produce multiple bands?

Isoforms · The supplied record lists one isoform and no alternative sequence. It therefore provides no isoform-based explanation for multiple bands.

Can annotated FOXG1 modifications explain a shifted band?

PTM · The supplied record lists no modified residues or glycosylation sites. It does not establish a modification-dependent shift or explain any difference between apparent and predicted mass.

Does this guide establish induction of FOXG1?

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 FOXG1?

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 A01852-1 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.

How should FOXG1 Western blot signals be quantified?

Quantitation · Compare bands from equivalently prepared samples within the same fraction, with consistent loading and normalization. FOXG1’s nuclear localization makes fraction consistency especially important.

What molecular weight should I expect for FOXG1?

Interpretation · The supplied predicted mass is 52.4 kDa. No empirical apparent band position is available, so use 52.4 kDa as a reference, not an exact migration requirement.

FOXG1 is annotated as nuclear. A nuclear-enriched fraction is a reasonable choice when signal is weak; compare equivalent fractions across samples.

The supplied features do not assign identities to unexpected bands: they list one isoform, no signal or propeptide, and no annotated modified residues or glycosylation sites. Check whether a candidate band is reproducible and enriched in nuclear samples before assigning it to FOXG1.

Boster reagents

FOXG1 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 FOXG1 Antibody (Center) (Cat. #A01852-1) in mouse brain tissue lysates (35ug/lane). FOXG1 (arrow) was detected using the purified Pab.

Anti-FOXG1 Antibody (Center)

Cat # A01852-1

View product →

Real WB data

Western blot analysis of FOXG1 using anti-FOXG1 antibody (A01852-2). Electrophoresis was performed on a 5-20% SDS-PAGE gel at 70V (Stacking gel) / 90V (Resolving gel) for 2-3 hours. The sample well of each lane was loaded with 30 ug of sample under reducing conditions. Lane 1: human U251 whole cell lysates, Lane 2: rat brain tissue lysates, Lane 3: mouse brain tissue lysates. 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-FOXG1 antigen affinity purified polyclonal antibody (Catalog # A01852-2) 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 FOXG1 at approximately 52 kDa. The expected band size for FOXG1 is at 52 kDa.

Anti-FOXG1 Antibody Picoband®

Cat # A01852-2

View product →

Real WB data Western blot analysis of FOXG1 in rat brain tissue lysate with FOXG1 antibody at 1 μg/ml.

Anti-Forkhead box protein G1 FOXG1 Antibody

Cat # A01852

View product →

Three the supplier anti-FOXG1 antibodies have WB images: A01852-1 in mouse brain lysate, A01852-2 in human U251 cells and rat and mouse brain lysates, and A01852 in rat brain lysate. These are tested examples; no publication evidence is supplied.

Which to pick: Match the antibody to your sample: A01852-2 shows human U251 cells and rat and mouse brain lysates, with a reported band near 52 kDa. A01852-1 shows mouse brain lysate; A01852 shows rat brain lysate.

Source: BosterBio FOXG1 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.

References

UniProt Consortium. UniProt entry P55316.
Human Protein Atlas. FOXG1 tissue expression.
PMC11735862 — target-verified WB comparison
PMC8726647 — target-verified WB comparison
PMC7405766 — target-verified WB comparison