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- Table of Contents
P4HB · Western blot design guide
P4HB Western Blot Planning Guide
Plan a P4HB Western blot around the catalog-observed 57.1 kDa band, image-backed A02335-1 evidence, HPA controls, and verified protocol records.
Evidence assembled July 2026 · For research use; verify linked source records and product datasheet before use
P4HB Western Blot Experimental Design Guide
Expected bands, documented protocol parameters, controls and antibodies — the at-a-glance facts below, then the full design guide.
Must know before running
| Expected band | 57.1 kDa | |
| Observed band | Not reported — verify product WB image | |
| Gel | 12-15% | |
| Positive control | Gallbladder | |
| Negative control | Skeletal muscle |
Important caveats
Reasons your observed band may differ from the expected size.
| ⓘ | Calculated mass | 57.1 kDa |
| ⓘ | Localization | Endoplasmic reticulum / Endoplasmic reticulum lumen |
| ⓘ | Processing / PTM | Record-dependent |
| ⓘ | Reactivity | Human / Mouse / Rat |
Section 1
Real Curated P4HB Western Blot Protocols
Start with the molecular-weight rule, then compare verified publication-derived conditions.
| Sample / lysate | Appendix |
| Gel % | 12-15% |
| Load | 20-30 µg total protein per lane |
| Transfer | Semi-dry, standard transfer |
| Membrane | 0.45 µm PVDF |
| Blocking | 5% non-fat milk or 5% BSA in TBST |
| Primary | A02335-1 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 P4HB Western Blot Band Size?
Use the product-observed 57.1 kDa band as the primary planning value and retain the UniProt calculated mass as context.
| 57.1 kDa | Matches the authoritative product WB observation. |
| 57.1 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 P4HB appearancePlan around 57.1 kDa and keep the calculated mass as supporting context.
| Catalog-observed band | 57.1 kDa; use this as the primary experimental expectation. |
| Calculated mass | 57.1 kDa from UniProt P07237; 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 A02335-1. |
| Situation | Likely cause | Next action |
|---|---|---|
| 57.1 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 P4HB band
A02335-1 · P4HB
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for P4HB Western blot
🧪Use Gallbladder as the first positive-control candidate and Skeletal muscle as the HPA Not detected negative candidate.
Positive control: Gallbladder (High)
Negative control: Skeletal muscle (Not detected)
HPA protein score determines control status; other expression data is supporting context only.
HPA tissue expression evidence for P4HB
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 |
|---|---|---|---|---|
| Gallbladder | Reported tissue cells | High | Protein (HPA) | HPA → |
| Colon | Reported tissue cells | High | Protein (HPA) | HPA → |
| Appendix | Reported tissue cells | High | Protein (HPA) | HPA → |
| Duodenum | Reported tissue cells | High | Protein (HPA) | HPA → |
Section 3
Advanced P4HB Western Blot Tips
Deeper troubleshooting and optimisation questions for P4HB, answered from its protein features.
Which band should guide the blot?
Use 57.1 kDa, the observation attached to the authoritative A02335-1 WB record.
How should calculated mass be interpreted?
Treat the UniProt calculated mass as context; it does not replace the catalog-observed 57.1 kDa expectation.
Which positive control should I start with?
Start with Gallbladder, the lead HPA protein-expression candidate.
Which negative control is defensible?
Use Skeletal muscle 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 P4HB Western blot?
Use the transfer method in the recommended protocol and verify transfer before blocking.
How should A02335-1 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
P4HB Western Blot Reagents
Human/Mouse/Rat-reactive P4HB Western blot reagents with authoritative product imagery.
Real WB data
Anti-P4HB Antibody Picoband®
Cat # A02335-1
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 P07237
- Human Protein Atlas — P4HB
- A02335-1 product record
- PMC7532080 — Targeted Inhibition of P4HB Promotes Cell Sensitivity to Gemcitabine in Urothelial Carcinoma of the Bladder (OncoTargets and therapy, 2020)
- PMC11585657 — P4HB maintains Wnt-dependent stemness in glioblastoma stem cells as a precision therapeutic target and serum marker (Oncogenesis, 2024)
- PMC7398890 — WHSC1 Promotes Cell Proliferation, Migration, and Invasion in Hepatocellular Carcinoma by Activating mTORC1 Signaling (OncoTargets and therapy, 2020)
