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- Table of Contents
KLF3 / Krueppel-like factor 3 · Western blot design guide
Design a Western Blot for KLF3
Real validated KLF3 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-KLF3 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
KLF3 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 | ~38.8 kDa | |
| Gel | 12–15% (standard starting point) | |
| Positive control | Adrenal gland (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 + Ubl conjugation | |
| Caveat | Modification-state controls | |
| Gene-set association | MSigDB Hallmark membership | |
| Isoform | 2 isoform(s) |
Section 1
Real Curated KLF3 Western Blot Protocols
The PA1888 protocol combines labelled catalog values with standard starting conditions. Published comparisons retain their own sample, reagent and detection scope.
| Sample / lysate | Rat Testis, HELA (catalog PA1888) |
| 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 | PA1888; 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 KLF3 Western Blot Band Size?
KLF3 is predicted at 38.8 kDa; isoforms and phosphorylation could affect migration, but no empirical band or visible shift is established.
| Single band near 38.8 kDa | Consistent with the predicted KLF3 mass; confirm identity with controls |
| Two bands of uncertain spacing | Isoforms 1 and 2 could differ in migration; distinct bands are not established |
| Band with altered mobility | Phosphorylation could contribute; a visible shift is not established |
| Little signal in a cytoplasmic fraction | KLF3 is nuclear |
💡Expected KLF3 appearanceKLF3 has a predicted mass of 38.8 kDa and no supplied empirical band; identify a candidate band with antibody specificity and fractionation controls, since isoform and phosphorylation effects on migration are unestablished.
| Predicted KLF3 mass | 38.8 kDa is the sequence-based reference, not a measured band |
| Isoform 1 | May differ in migration from isoform 2; relative size is unknown |
| Isoform 2 | May differ in migration from isoform 1; relative size is unknown |
| Phosphoserines at residues 71, 92, 101, 108, 111, 216, 224, and 250 | Could affect mobility; no visible size change is demonstrated |
| Situation | Likely cause | Next action |
|---|---|---|
| Band higher than expected | Phosphorylation is possible, but its effect on migration is unproven | Compare phosphatase-treated and untreated samples with antibody specificity controls |
| Band lower than expected | Isoform-dependent migration is possible; isoform masses are unavailable | Check isoform expression and confirm band identity with an independent antibody |
| Multiple bands | Isoforms or phosphorylation states could contribute; distinct bands are unproven | Compare isoform controls and phosphatase-treated samples |
| Weak or no signal | Nuclear KLF3 may be poorly represented in the tested fraction | Check a nuclear fraction and its loading control |
| Fragments below expected size | Possible sample degradation; no KLF3 cleavage feature is supplied | Prepare fresh lysate with protease inhibitors and verify band identity |
Experiment evidence
Western blot images showing KLF3 band
PA1888 · KLF3
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for KLF3 Western blot
🧪HPA-IHC candidate guidance (verify in WB): For positive controls for KLF3 in Western blot, you can use adrenal gland tissue, which HPA scores High.
Positive control: Adrenal gland (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: KLF3 is nuclear, so nuclear enrichment may help detect its signal.
HPA tissue expression evidence for KLF3
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 |
|---|---|---|---|---|
| Adrenal gland | glandular cells | High | Protein (IHC) | HPA → |
| Appendix | glandular cells | High | Protein (IHC) | HPA → |
| Bone marrow | hematopoietic cells | High | Protein (IHC) | HPA → |
| Breast | glandular cells | High | Protein (IHC) | HPA → |
| Bronchus | respiratory epithelial cells | High | 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 → |
| Cerebellum | granular cells - nucleus | Medium | Protein (IHC) | HPA → |
| Endometrium | glandular cells | Medium | Protein (IHC) | HPA → |
| Liver | cholangiocytes | Medium | Protein (IHC) | HPA → |
| Ovary | ovarian stroma cells | Medium | Protein (IHC) | HPA → |
Section 3
Advanced KLF3 Western Blot Tips
Deeper troubleshooting and optimisation questions for KLF3, answered from its protein features.
Where should the KLF3 band appear?
Band shift · The predicted mass of canonical KLF3 is 38.8 kDa. No observed band position is supplied, so use this as a reference rather than an exact migration target.
Could KLF3 isoforms produce different bands?
Isoforms · UniProt lists isoforms 1 and 2. Isoform 2 lacks residues 233–345 of the 345-residue canonical sequence, so it may run below isoform 1. Check which isoform the antibody recognizes before assigning bands.
Which KLF3 phosphorylation sites matter for Western blot interpretation?
PTM · UniProt lists phosphoserines at positions 71, 92, 101, 108, 111, 216, 224, and 250. These are UniProt canonical-sequence coordinates; check the antibody or paper's numbering convention before comparing sites.
KLF3 has eight listed phosphoserines, but their presence alone does not establish a visible shift or explain a mass difference. Compare matched samples with and without phosphatase treatment if testing whether phosphorylation affects migration.
KLF3 has eight listed phosphoserines, but their presence alone does not establish a visible shift or explain a mass difference. Compare matched samples with and without phosphatase treatment if testing whether phosphorylation affects migration.
Does this guide establish induction of KLF3?
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 KLF3?
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 PA1888 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 KLF3 bands be quantified?
Quantitation · Decide whether the measurement targets one isoform or total KLF3 before quantifying. Isoform 2 lacks residues 233–345, so an antibody's recognition region can affect which bands contribute to the measurement.
Which sample fraction is useful for KLF3 detection?
Interpretation · KLF3 is annotated as nuclear. A nuclear fraction is therefore a reasonable sample to assess alongside whole-cell lysate, especially if the whole-cell signal is weak.
First compare bands with the 38.8 kDa canonical prediction and the shorter isoform 2. Then check antibody recognition against the missing 233–345 region. Listed phosphorylation sites justify further testing, but do not by themselves identify a shifted band.
First compare bands with the 38.8 kDa canonical prediction and the shorter isoform 2. Then check antibody recognition against the missing 233–345 region. Listed phosphorylation sites justify further testing, but do not by themselves identify a shifted band.
Boster reagents
KLF3 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-Krueppel-like factor 3 KLF3 Antibody Picoband®
Cat # PA1888
PA1888 is the listed anti-KLF3 antibody, with reported reactivity to rat, mouse, and human. Its Western blot image shows rat testis tissue lysate and HeLa cell lysate; no mouse sample is shown in the supplied evidence.
Which to pick: PA1888 is the only listed option. Its Western blot image provides examples in rat testis tissue and HeLa cell lysates; choose it with your sample species and the limited shown contexts in mind.
Source: BosterBio KLF3 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry P57682.
- Human Protein Atlas. KLF3 tissue expression.
- PMC9343318 — target-verified WB comparison
- PMC7747509 — target-verified WB comparison
- PMC7653263 — target-verified WB comparison