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- Table of Contents
KLK4 · Western blot design guide
KLK4 Western Blot Planning Guide
Plan a KLK4 Western blot around the catalog-observed 27 kDa band, image-backed PB9260 evidence, HPA controls, and verified protocol records.
Evidence assembled July 2026 · For research use; verify linked source records and product datasheet before use
KLK4 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 | 27 kDa | |
| Observed band | Not reported — verify product WB image | |
| Gel | 12-15% | |
| Positive control | Prostate | |
| Negative control | Appendix |
Important caveats
Reasons your observed band may differ from the expected size.
| ⓘ | Calculated mass | 27 kDa |
| ⓘ | Localization | Secreted |
| ⓘ | Processing / PTM | Record-dependent |
| ⓘ | Reactivity | Human |
Section 1
Real Curated KLK4 Western Blot Protocols
Start with the molecular-weight rule, then compare verified publication-derived conditions.
| Sample / lysate | Prostate |
| Gel % | 12-15% |
| Load | 20-30 µg total protein per lane |
| Transfer | Semi-dry, short transfer |
| Membrane | 0.45 µm PVDF |
| Blocking | 5% non-fat milk or 5% BSA in TBST |
| Primary | PB9260 at datasheet starting dilution |
| Primary incubation | Overnight at 4 °C with gentle agitation |
| Secondary | Species-matched HRP conjugate at validated dilution |
| Wash | 3 × 5 min in TBST |
| Detection | Chemiluminescent substrate |
| Exposure | Bracket exposures to avoid saturation |
Section 2
What Is the Expected KLK4 Western Blot Band Size?
Use the product-observed 27 kDa band as the primary planning value and retain the UniProt calculated mass as context.
| 27 kDa | Matches the authoritative product WB observation. |
| 27 kDa calculated | Use as UniProt context, not as a replacement observed band. |
| Unexpected additional signal | Do not assign identity without orthogonal positive/negative controls. |
💡Expected KLK4 appearancePlan around 27 kDa and keep the calculated mass as supporting context.
| Catalog-observed band | 27 kDa; use this as the primary experimental expectation. |
| Calculated mass | 27 kDa from UniProt Q9Y5K2; retain as context. |
| Gel selection | 12-15%; shared with the recommended protocol and poster. |
| Specificity check | Compare the lead HPA positive and negative controls with PB9260. |
| Situation | Likely cause | Next action |
|---|---|---|
| 27 kDa | Matches the authoritative product WB observation. | Confirm with orthogonal controls and the linked product record. |
| Additional band | May reflect processing, modification, or non-specific signal. | Run a dilution series and compare positive/negative controls. |
| Weak signal | Target abundance or transfer may be limiting. | Verify transfer, increase positive-control abundance, and bracket exposure. |
Experiment evidence
Western blot images showing KLK4 band
PB9260 · KLK4
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for KLK4 Western blot
🧪Use Prostate as the first positive-control candidate and Appendix as the HPA Not detected negative candidate.
Positive control: Prostate (High)
Negative control: Appendix (Not detected)
HPA protein score determines control status; other expression data is supporting context only.
HPA tissue expression evidence for KLK4
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 |
|---|---|---|---|---|
| Prostate | Reported tissue cells | High | Protein (HPA) | HPA → |
Section 3
Advanced KLK4 Western Blot Tips
Deeper troubleshooting and optimisation questions for KLK4, answered from its protein features.
Which band should guide the blot?
Use 27 kDa, the observation attached to the authoritative PB9260 WB record.
How should calculated mass be interpreted?
Treat the UniProt calculated mass as context; it does not replace the catalog-observed 27 kDa expectation.
Which positive control should I start with?
Start with Prostate, the lead HPA protein-expression candidate.
Which negative control is defensible?
Use Appendix as an orthogonal HPA Not detected candidate.
Which gel should I use?
Use 12-15% consistently across the quick facts, protocol table, and poster.
What transfer method to use for KLK4 Western blot?
Use the transfer method in the recommended protocol and verify transfer before blocking.
How should PB9260 be started?
Start at the linked datasheet condition and run a three-point primary-antibody dilution test.
Which publication-derived protocols can I compare?
No verified publication protocol was supplied; use only the deterministic recommended protocol.
Boster reagents
KLK4 Western Blot Reagents
Human-reactive KLK4 Western blot reagents with authoritative product imagery.
Real WB data
Anti-Kallikrein 4/KLK4 Antibody Picoband®
Cat # PB9260
Only image-backed, WB-validated Human/Mouse/Rat recommendations from the prepared catalog evidence are shown.
Source: prepared picoband-wb product evidence; each card retains its own SKU, URL, observed band, and authoritative WB image.
References
- UniProt Q9Y5K2
- Human Protein Atlas — KLK4
- PB9260 product record
- PMC9922183 — Long Noncoding RNA LINC01503 Silencing Suppresses KLK4 Expression to Impede Pancreatic Cancer Development as miR-1321 Sponge (BioMed research international, 2023)
- PMC3581584 — Paclitaxel resistance and multicellular spheroid formation are induced by kallikrein-related peptidase 4 in serous ovarian cancer cells in an ascites mimicking microenvironment (PloS one, 2013)
- PMC7186775 — Circular RNA Circ_0025033 Promotes the Evolvement of Ovarian Cancer Through the Regulation of miR-330-5p/KLK4 Axis (Cancer management and research, 2020)