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- Table of Contents
SRD5A1 · Western blot design guide
SRD5A1 Western Blot Planning Guide
Plan a SRD5A1 Western blot around the catalog-observed 29.5 kDa band, image-backed A03464-2 evidence, HPA controls, and verified protocol records.
Evidence assembled July 2026 · For research use; verify linked source records and product datasheet before use
SRD5A1 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 | 29.5 kDa | |
| Observed band | Not reported — verify product WB image | |
| Gel | 12-15% | |
| Positive control | Kidney | |
| Negative control | Bone marrow |
Important caveats
Reasons your observed band may differ from the expected size.
| ⓘ | Calculated mass | 29.5 kDa |
| ⓘ | Localization | Microsome membrane / Endoplasmic reticulum membrane |
| ⓘ | Processing / PTM | Record-dependent |
| ⓘ | Reactivity | Human / Mouse / Rat |
Section 1
Real Curated SRD5A1 Western Blot Protocols
Start with the molecular-weight rule, then compare verified publication-derived conditions.
| Sample / lysate | Adrenal gland |
| 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 | A03464-2 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 SRD5A1 Western Blot Band Size?
Use the product-observed 29.5 kDa band as the primary planning value and retain the UniProt calculated mass as context.
| 29.5 kDa | Matches the authoritative product WB observation. |
| 29.5 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 SRD5A1 appearancePlan around 29.5 kDa and keep the calculated mass as supporting context.
| Catalog-observed band | 29.5 kDa; use this as the primary experimental expectation. |
| Calculated mass | 29.5 kDa from UniProt P18405; 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 A03464-2. |
| Situation | Likely cause | Next action |
|---|---|---|
| 29.5 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 SRD5A1 band
A03464-2 · SRD5A1
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for SRD5A1 Western blot
🧪Use Kidney as the first positive-control candidate and Bone marrow as the HPA Not detected negative candidate.
Positive control: Kidney (High)
Negative control: Bone marrow (Not detected)
HPA protein score determines control status; other expression data is supporting context only.
HPA tissue expression evidence for SRD5A1
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 |
|---|---|---|---|---|
| Kidney | Reported tissue cells | High | Protein (HPA) | HPA → |
| Fallopian tube | Reported tissue cells | High | Protein (HPA) | HPA → |
| Adrenal gland | Reported tissue cells | High | Protein (HPA) | HPA → |
| Appendix | Reported tissue cells | High | Protein (HPA) | HPA → |
Section 3
Advanced SRD5A1 Western Blot Tips
Deeper troubleshooting and optimisation questions for SRD5A1, answered from its protein features.
Which band should guide the blot?
Use 29.5 kDa, the observation attached to the authoritative A03464-2 WB record.
How should calculated mass be interpreted?
Treat the UniProt calculated mass as context; it does not replace the catalog-observed 29.5 kDa expectation.
Which positive control should I start with?
Start with Kidney, the lead HPA protein-expression candidate.
Which negative control is defensible?
Use Bone marrow 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 SRD5A1 Western blot?
Use the transfer method in the recommended protocol and verify transfer before blocking.
How should A03464-2 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
SRD5A1 Western Blot Reagents
Human/Mouse/Rat-reactive SRD5A1 Western blot reagents with authoritative product imagery.
Real WB data
Anti-SRD5A1 Antibody Picoband®
Cat # A03464-2
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 P18405
- Human Protein Atlas — SRD5A1
- A03464-2 product record
- PMC7904855 — Suppression of steroid 5α-reductase type I promotes cellular apoptosis and autophagy via PI3K/Akt/mTOR pathway in multiple myeloma (Cell death & disease, 2021)
- PMC7484213 — Steroid 5α-Reductase Type I Induces Cell Viability and Migration via Nuclear Factor-κB/Vascular Endothelial Growth Factor Signaling Pathway in Colorectal Cancer (Frontiers in oncology, 2020)
- PMC12752638 — Hepatic KLF9 Deficiency Inhibits Dehydroepiandrosterone (DHEA)-Induced Polycystic Ovary Syndrome via Liver-Ovary Axis (Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2025)