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- Table of Contents
SCD / Stearoyl-CoA desaturase · Western blot design guide
Design a Western Blot for SCD
Real validated SCD Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-SCD 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
SCD 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 | ~41.5 kDa | |
| Observed band | Approximately 37 and 42 kDa | |
| Gel | 5–20% (catalog A00588-1) | |
| Positive control | Adipose tissue (IHC candidate; verify WB) +4 more | |
| Negative control | Suggested KO / knockdown lysate |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Phosphorylated | |
| Caveat | Phosphorylation-state controls | |
| Gene-set association | MSigDB Hallmark membership | |
| Isoform | 1 isoform(s) |
Section 1
Real Curated SCD Western Blot Protocols
The A00588-1 protocol combines labelled catalog values with standard starting conditions. Published comparisons retain their own sample, reagent and detection scope.
| Sample / lysate | human A549, human HepG2 (catalog A00588-1) |
| Gel % | 5–20% (catalog A00588-1) |
| Load | 30 ug; reducing conditions (catalog A00588-1) |
| Transfer | a nitrocellulose membrane at 150 mA for 50-90 minutes (catalog A00588-1) |
| Membrane | nitrocellulose membrane (catalog A00588-1) |
| Blocking | 5% non-fat milk/TBS for 1.5 hour at RT (catalog A00588-1) |
| Primary antibody | A00588-1 · 0.5 μg/mL (catalog A00588-1) |
| Primary incubation | overnight at 4°C (catalog A00588-1) |
| Secondary antibody | goat anti-rabbit IgG-HRP, 1:5000 (catalog A00588-1) |
| Secondary incubation | 1.5 hour at RT (catalog A00588-1) |
| Wash | TBS-0.1%Tween 3 times with 5 minutes each (catalog A00588-1) |
| Detection | ECL (catalog A00588-1) |
Section 2
What Is the Expected SCD Western Blot Band Size?
SCD is predicted at 41.5 kDa; observed bands are approximately 37 and 42 kDa, and the cause of the difference is not established.
| Band near 42 kDa | Empirically observed SCD band near its 41.5 kDa predicted mass; confirm identity with controls |
| Band near 37 kDa | Empirically observed SCD signal with an unexplained difference from predicted mass; confirm identity with controls |
| Bands near 37 and 42 kDa | Both apparent bands were reported; their relationship is not established |
| Band near 83 kDa | Possible retained SCD homodimer if self-association survives sample preparation |
💡Expected SCD appearanceSCD has a predicted mass of 41.5 kDa, while antibody blots report bands at approximately 37 and 42 kDa; the difference is unexplained, so confirm band identity with appropriate controls.
| Predicted SCD mass | 41.5 kDa provides the sequence-based reference; an approximately 42 kDa band was observed |
| Possible homodimer formation | Could yield an approximately twofold higher band if the complex survives sample preparation |
| Ser198 phosphorylation | Could affect mobility, but no visible shift is established |
| Ser203 phosphorylation | Could affect mobility, but no visible shift is established |
| Situation | Likely cause | Next action |
|---|---|---|
| No band in lysate | SCD is a multi-pass endoplasmic reticulum membrane protein and may be poorly extracted | Check membrane protein extraction and include a positive-control lysate |
| Band higher than expected | SCD may self-associate into homodimers | Compare denaturing sample preparations and verify the band with an SCD knockdown control |
| Band lower than expected | An approximately 37 kDa band is reported, but its migration difference is unexplained | Check whether the band decreases after SCD knockdown |
| Multiple bands | Approximately 37 and 42 kDa bands were reported without an established explanation | Compare both bands with SCD knockdown and an independent antibody |
| Weak or no signal | Incomplete recovery of membrane-associated SCD may reduce signal | Check lysate preparation and confirm recovery of an endoplasmic reticulum membrane marker |
Experiment evidence
Western blot images showing SCD band
A00588-1 · SCD
A00588-2 · SCD
A00588-2 · SCD
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for SCD Western blot
🧪HPA-IHC candidate guidance (verify in WB): For positive controls for SCD in Western blot, you can use adipose tissue, which shows high HPA expression.
Positive control: Adipose tissue (IHC candidate; verify WB)
Negative control: Suggested KO / knockdown lysate
Loading controls: Run GAPDH, β-actin, and a total-protein stain alongside the samples.
⚠️Feasibility: No tissue is listed as not detected, so use siRNA knockdown or a KO line for a negative control.
HPA tissue expression evidence for SCD
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 |
|---|---|---|---|---|
| Adipose tissue | adipocytes | High | Protein (IHC) | HPA → |
| Adrenal gland | glandular cells | High | Protein (IHC) | HPA → |
| Appendix | glandular cells | High | Protein (IHC) | HPA → |
| Breast | adipocytes | 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 |
|---|---|---|---|---|
| Bone marrow | hematopoietic cells | Medium | Protein (IHC) | HPA → |
| Caudate | glial cells | Medium | Protein (IHC) | HPA → |
| Hippocampus | glial cells | Medium | Protein (IHC) | HPA → |
| Kidney | cells in tubules | Medium | Protein (IHC) | HPA → |
| Ovary | ovarian stroma cells | Medium | Protein (IHC) | HPA → |
Section 3
Advanced SCD Western Blot Tips
Deeper troubleshooting and optimisation questions for SCD, answered from its protein features.
What might a higher-than-expected SCD band indicate?
Band shift · SCD may self-associate and form homodimers, making self-association one possibility to investigate for a higher band. That annotation does not establish that a particular Western blot band is a dimer; confirm its identity before assigning it.
Could the two bands represent annotated SCD isoforms?
Isoforms · Only one isoform is listed, with no alternative sequence supplied. These features do not support assigning the 37 and 42 kDa bands to different annotated isoforms.
Could phosphorylation account for an SCD band shift?
PTM · UniProt lists phosphoserines at positions 198 and 203, using UniProt sequence numbering. Phosphorylation is worth considering when investigating band differences, but the listed sites alone do not establish a visible shift or explain the 37 and 42 kDa bands.
Does this guide establish induction of SCD?
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 SCD Western blot?
Transfer · SCD is annotated as a multi-pass endoplasmic reticulum membrane protein. Check transfer efficiency by examining protein left in the gel and retained on the membrane, then adjust transfer conditions if needed. The supplied features do not specify one transfer method.
How should blocking be optimized?
Blocking · Standard workflow guidance: follow the A00588-1 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 the two SCD bands be quantified?
Quantitation · Measure the 37 and 42 kDa bands separately and report which band is being compared across samples. Their identities are not established by the supplied features, so combining them into one SCD value requires additional validation.
How do the 37 and 42 kDa bands compare with predicted SCD mass?
Interpretation · SCD’s predicted mass is 41.5 kDa, close to the observed 42 kDa band. The supplied features do not explain the 37 kDa band or establish why either band migrates at its apparent mass.
Boster reagents
SCD 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-SCD Antibody Picoband®
Cat # A00588-1
Real WB data
Anti-SCD Antibody Picoband®
Cat # A00588-2
Two human-reactive anti-SCD rabbit polyclonal antibodies have WB images from human whole-cell lysates. A00588-1 reports bands near 37 and 42 kDa (42 kDa expected); A00588-2 reports a 37 kDa band (41 kDa expected). No independent validation is supplied.
Which to pick: Choose A00588-1 for an A549 or HepG2 starting context, or A00588-2 for A431, MCF-7, or HepG2. Both have WB images using 30 μg reducing lysate and antibody at 0.5 μg/mL; these cell lines are tested examples only.
Source: BosterBio SCD gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry O00767.
- Human Protein Atlas. SCD tissue expression.
- PMC8576664 — target-verified WB comparison
- PMC4446951 — target-verified WB comparison
- PMC3999186 — target-verified WB comparison