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ARHGEF2 / Rho guanine nucleotide exchange factor 2 · Western blot design guide
Design a Western Blot for ARHGEF2
Source-linked ARHGEF2 Western blot protocol options, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-ARHGEF2 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
ARHGEF2 Western Blot Experimental Design Guide
Expected bands, source-linked protocol options, controls and antibodies — the at-a-glance facts below, then the full design guide.
Must know before running
| Expected band | ~111.5 kDa | |
| Observed band | ~112 kDa | |
| Gel | 5–20% (catalog A02572-3) | |
| Positive control | Bone marrow (IHC candidate; verify WB) +4 more | |
| Negative control | Adipose tissue (IHC candidate; verify WB) |
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 | 3 isoform(s) |
Section 1
Source-Linked ARHGEF2 Western Blot Protocol Options
The A02572-3 protocol combines labelled catalog values with standard starting conditions. Published comparisons retain their own sample, reagent and detection scope.
| Sample / lysate | human 293T, human Hela, human PC-3, rat brain, rat C6, mouse brain, mouse Raw264.7 (catalog A02572-3) |
| Gel % | 5–20% (catalog A02572-3) |
| Load | 30 ug; reducing conditions (catalog A02572-3) |
| Transfer | a nitrocellulose membrane at 150 mA for 50-90 minutes (catalog A02572-3) |
| Membrane | nitrocellulose membrane (catalog A02572-3) |
| Blocking | 5% non-fat milk/TBS for 1.5 hour at RT (catalog A02572-3) |
| Primary antibody | A02572-3 · 0.5 μg/mL (catalog A02572-3) |
| Primary incubation | overnight at 4°C (catalog A02572-3) |
| Secondary antibody | goat anti-rabbit IgG-HRP, 1:5000 (catalog A02572-3) |
| Secondary incubation | 1.5 hour at RT (catalog A02572-3) |
| Wash | TBS-0.1%Tween 3 times with 5 minutes each (catalog A02572-3) |
| Detection | ECL (catalog A02572-3) |
Section 2
What Is the Expected ARHGEF2 Western Blot Band Size?
ARHGEF2 is predicted at 111.5 kDa and observed at ~112 kDa; the cause of the small difference is not established.
| Band at ~112 kDa | Matches the empirical ARHGEF2 band and its 111.5 kDa predicted mass |
| Single band near ~112 kDa | Isoforms 1, 2 and 3 need not resolve as separate bands |
| Additional bands near ~112 kDa | Annotated splice isoforms are possible identities, pending validation |
| Stronger band in a cytoskeletal fraction | Consistent with ARHGEF2 cytoskeletal localization |
💡Expected ARHGEF2 appearanceARHGEF2 is predicted at 111.5 kDa and has an empirical band at ~112 kDa; confirm band identity with appropriate controls, especially if additional bands appear.
| Predicted molecular mass | 111.5 kDa provides the reference for the observed ~112 kDa band |
| Splice isoform 1 | May differ in apparent size from other isoforms; its mass is unspecified |
| Splice isoform 2 | May differ in apparent size from other isoforms; its mass is unspecified |
| Splice isoform 3 | May differ in apparent size from other isoforms; its mass is unspecified |
| Situation | Likely cause | Next action |
|---|---|---|
| No band in lysate | Cytoskeleton-associated ARHGEF2 may be poorly recovered by extraction | Check the insoluble fraction and confirm extraction with a band-identity control |
| Band higher than expected | Its identity or cause of altered migration is unestablished | Compare with the ~112 kDa reference and verify with ARHGEF2 depletion |
| Band lower than expected | A splice isoform is possible, but isoform masses are unspecified | Verify with ARHGEF2 depletion and an isoform-specific assay |
| Multiple bands | Splice isoforms 1, 2 and 3 are annotated, but their separation is unestablished | Check which bands respond to ARHGEF2 depletion |
| Weak or no signal | Cytoskeletal association may reduce recovery in the tested fraction | Assess extraction and compare soluble and insoluble fractions |
Experiment evidence
Western blot images showing ARHGEF2 band
A02572-3 · ARHGEF2
M02572-1 · ARHGEF2
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for ARHGEF2 Western blot
🧪HPA-IHC candidate guidance (verify in WB): For positive controls for ARHGEF2 in Western blot, you can use bone marrow lysate.
Positive control: Bone marrow (IHC candidate; verify WB)
Negative control: Adipose tissue (IHC candidate; verify WB)
Loading controls: Run GAPDH, β-actin, and a total-protein stain such as Ponceau alongside the samples.
⚠️Feasibility: HPA reports ARHGEF2 as high in bone marrow and not detected in adipose tissue, making tissue controls feasible.
HPA tissue expression evidence for ARHGEF2
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 |
|---|---|---|---|---|
| Bone marrow | hematopoietic cells | High | Protein (IHC) | HPA → |
| Lymph node | germinal center cells | High | Protein (IHC) | HPA → |
| Testis | elongated or late spermatids | High | Protein (IHC) | HPA → |
| Tonsil | germinal center cells | High | Protein (IHC) | HPA → |
| Adrenal gland | glandular cells | Medium | Protein (IHC) | HPA → |
Lower expression tissues · IHC evidence, not confirmed WB-negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adipose tissue | adipocytes | Not detected | Protein (IHC) | HPA → |
| Bronchus | basal cells | Not detected | Protein (IHC) | HPA → |
| Cervix | glandular cells | Not detected | Protein (IHC) | HPA → |
| Epididymis | glandular cells | Not detected | Protein (IHC) | HPA → |
| Esophagus | squamous epithelial cells | Not detected | Protein (IHC) | HPA → |
Section 3
Advanced ARHGEF2 Western Blot Tips
Deeper troubleshooting and optimisation questions for ARHGEF2, answered from its protein features.
How should ARHGEF2 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.
Which ARHGEF2 isoforms could produce different bands?
Isoforms · Three isoforms are listed. Relative to the canonical sequence, isoform 2 lacks residue 194; isoform 3 lacks residues 1–27 and 194. Check whether the antibody epitope is retained before assigning a band to an isoform.
Which kinase-linked sites can guide phospho-ARHGEF2 experiments?
PTM · In UniProt canonical coordinates, Ser143 and Ser896 are phosphorylated by PAK4, Thr679 by MAPK1 or MAPK3, and Ser886 by PAK1 and AURKA. Match the assay to the site and compare phosphosite signal with total ARHGEF2. These features do not establish a visible band shift.
For a phosphosite-specific antibody, compare blockers using the same sample and exposure, then choose the condition with clear signal and low background. The supplied features identify phosphorylation sites but do not specify a preferred blocker.
Quantify a site-specific phospho signal relative to total ARHGEF2 from matched samples. Report which UniProt canonical site is measured, since numbering in papers or antibody labels may differ. Total ARHGEF2 signal alone cannot distinguish its listed phosphorylation states.
For a phosphosite-specific antibody, compare blockers using the same sample and exposure, then choose the condition with clear signal and low background. The supplied features identify phosphorylation sites but do not specify a preferred blocker.
Quantify a site-specific phospho signal relative to total ARHGEF2 from matched samples. Report which UniProt canonical site is measured, since numbering in papers or antibody labels may differ. Total ARHGEF2 signal alone cannot distinguish its listed phosphorylation states.
Does this guide establish induction of ARHGEF2?
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.
What transfer method to use for ARHGEF2 Western blot?
Transfer · ARHGEF2 is approximately 112 kDa, so use a transfer method validated for proteins of that size. Check membrane staining and residual protein in the gel to confirm transfer; the supplied features do not identify one optimal method.
How should blocking be optimized?
Blocking · Standard workflow guidance: follow the A02572-3 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 ARHGEF2 be quantified?
Quantitation · Standard workflow guidance: quantify only a validated target band within the linear exposure range. Use consistent sample preparation and loading, retain biological replicates, and avoid interpreting saturation or loading differences as regulation.
Does ARHGEF2 migrate above its predicted mass?
Interpretation · Its predicted mass is 111.5 kDa, and the supplied observed band is approximately 112 kDa. The listed modifications do not, by themselves, establish a visible shift or explain a mass difference.
Check whether a band is consistent with the approximately 112 kDa observed band, whether the antibody recognizes all three isoforms, and whether the signal tracks total ARHGEF2. Isoform 2 lacks canonical residue 194; isoform 3 also lacks residues 1–27. The modification list alone cannot assign an unexpected band.
Check whether a band is consistent with the approximately 112 kDa observed band, whether the antibody recognizes all three isoforms, and whether the signal tracks total ARHGEF2. Isoform 2 lacks canonical residue 194; isoform 3 also lacks residues 1–27. The modification list alone cannot assign an unexpected band.
Boster reagents
ARHGEF2 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-GEF-H1/ARHGEF2 Antibody Picoband®
Cat # A02572-3
Real WB data
Anti-GEF H1 Rabbit Monoclonal Antibody
Cat # M02572-1
Both listed anti-ARHGEF2 antibodies have Western blot images. A02572-3 shows an approximately 112 kDa band in the named human, rat, and mouse lysates. M02572-1 shows GEF H1 expression in HEK293 lysate; its caption gives no band size or assay conditions.
Which to pick: Choose A02572-3 if its documented human, rat, or mouse sample and protocol match your experiment. M02572-1 is a rabbit monoclonal with a HEK293 Western blot image, but its caption provides less detail for planning conditions.
Source: BosterBio ARHGEF2 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry Q92974.
- Human Protein Atlas. ARHGEF2 tissue expression.
- PMC9637107 — target-verified WB comparison
- PMC13426208 — target-verified WB comparison
- PMC8405734 — target-verified WB comparison