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- Table of Contents
SCAMP4 / Secretory carrier-associated membrane protein 4 · Western blot design guide
Design a Western Blot for SCAMP4
Source-linked SCAMP4 Western blot protocol options, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-SCAMP4 WB antibodies. Everything you need to plan the experiment before you commit precious samples.
Evidence assembled October 2026 · For research use; verify linked source records and product datasheet before use
SCAMP4 Western Blot Experimental Design Guide
Expected bands, source-linked protocol options, controls and antibodies — the at-a-glance facts below, then the full design guide.
Must know before running
| Expected band | ~25.7 kDa | |
| Observed band | 68 kDa | |
| Gel | 12–15% (standard starting point) | |
| Positive control | Breast (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 | |
| Caveat | Band identity controls | |
| Gene-set association | MSigDB C7 membership | |
| Isoform | 3 isoform(s) |
Section 1
Source-Linked SCAMP4 Western Blot Protocol Options
The A16237 protocol combines labelled catalog values with standard starting conditions. Published comparisons retain their own sample, reagent and detection scope.
| Sample / lysate | 3T3 cell lysate (catalog A16237) |
| Gel % | 12–15% (standard starting point) |
| Load | 20–30 µg total protein per lane; optimize for abundance (standard starting point) |
| Transfer | Short semi-dry transfer; verify retention (standard starting point) |
| Membrane | 0.45 µm PVDF (standard starting point) |
| Blocking | 5% milk or 5% BSA in TBST (standard starting point) |
| Primary antibody | A16237 · (A) 1 and (B) 2 μg/mL (catalog A16237) |
| 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 SCAMP4 Western Blot Band Size?
SCAMP4 is predicted at 25.7 kDa, while antibody QC reports 68 kDa; the cause of this difference is not established.
| Band near 68 kDa | Empirical SCAMP4 antibody QC band; confirm identity with band controls |
| Band near 25.7 kDa | Consistent with predicted sequence mass, but not established as the observed band |
| Multiple discrete bands | Could reflect isoforms 1, 2, and 3; their migration is not established |
| Little or no lysate band | Membrane localization may make SCAMP4 difficult to recover |
💡Expected SCAMP4 appearanceSCAMP4 has a predicted mass of 25.7 kDa and an empirical band at 68 kDa; the cause of the difference is unknown, so confirm band identity with knockdown or an independent antibody.
| Predicted sequence mass | 25.7 kDa; does not establish apparent migration |
| Splice isoform 1 | Could differ in size from other isoforms; its mass is not supplied |
| Splice isoform 2 | Could differ in size from other isoforms; its mass is not supplied |
| Splice isoform 3 | Could differ in size from other isoforms; its mass is not supplied |
| Situation | Likely cause | Next action |
|---|---|---|
| No band in lysate | Multi-pass membrane localization may limit recovery | Check membrane extraction and include a positive control |
| Band higher than expected | The empirical 68 kDa band differs from the 25.7 kDa prediction for an unknown reason | Confirm identity by knockdown or an independent antibody |
| Band lower than expected | An alternative isoform is possible, but its mass is unknown | Check isoform expression and confirm band identity |
| Multiple bands | Three splice isoforms are annotated, but distinct migration is unproven | Use isoform-aware controls or knockdown to assign bands |
| Weak or no signal | Incomplete recovery of membrane-associated SCAMP4 is possible | Assess membrane extraction and run a positive-control lysate |
Experiment evidence
Western blot images showing SCAMP4 band
A16237 · SCAMP4
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for SCAMP4 Western blot
🧪HPA-IHC candidate guidance (verify in WB): For positive controls for SCAMP4 in Western blot, you can use breast tissue, which shows high expression in HPA.
Positive control: Breast (IHC candidate; verify WB)
Negative control: Adipose tissue (IHC candidate; verify WB)
Loading controls: Run GAPDH, β-actin, and a total-protein stain alongside the samples.
⚠️Feasibility: As a multi-pass membrane protein, SCAMP4 may be easier to detect in membrane-enriched lysate.
HPA tissue expression evidence for SCAMP4
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 |
|---|---|---|---|---|
| Breast | glandular cells | High | Protein (IHC) | HPA → |
| Bronchus | respiratory epithelial cells | High | Protein (IHC) | HPA → |
| Caudate | neuronal cells | High | Protein (IHC) | HPA → |
| Duodenum | glandular cells | High | Protein (IHC) | HPA → |
| Endometrium | glandular 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 → |
| Skeletal muscle | myocytes | Not detected | Protein (IHC) | HPA → |
| Appendix | glandular cells | Low | Protein (IHC) | HPA → |
| Bone marrow | hematopoietic cells | Low | Protein (IHC) | HPA → |
| Heart muscle | cardiomyocytes | Low | Protein (IHC) | HPA → |
Section 3
Advanced SCAMP4 Western Blot Tips
Deeper troubleshooting and optimisation questions for SCAMP4, answered from its protein features.
How should SCAMP4 band migration be interpreted?
Band shift · Use the separately labelled calculated mass and catalog-observed evidence above. A sequence annotation does not establish an observed migration shift. Verify target identity with orthogonal controls.
How could SCAMP4 isoforms affect band interpretation?
Isoforms · UniProt lists three isoforms. Isoform 2 lacks canonical residues 99–132; isoform 3 replaces canonical residues 132–229 with glycine. These sequence differences can affect which forms an antibody detects. Do not assign a band to an isoform from its position alone.
Check the antibody epitope against the shared sequence before interpreting missing bands. Canonical residues 99–132 are absent from isoform 2, and residues 132–229 are replaced in isoform 3. An epitope within either altered region may exclude an isoform.
Check the antibody epitope against the shared sequence before interpreting missing bands. Canonical residues 99–132 are absent from isoform 2, and residues 132–229 are replaced in isoform 3. An epitope within either altered region may exclude an isoform.
Can phosphorylation explain a shifted SCAMP4 band?
PTM · UniProt lists phosphothreonine at position 194 in the canonical sequence. This position lies in the region replaced in isoform 3; residue numbering may differ between isoforms or antibody descriptions. The listed modification alone does not demonstrate a visible shift or explain the observed 68 kDa band.
Does this guide establish induction of SCAMP4?
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 SCAMP4 Western blot?
Transfer · SCAMP4 is a 229-residue, multi-pass membrane protein. Check transfer by inspecting protein remaining in the gel and protein captured on the membrane under your chosen conditions. The supplied features do not establish whether wet or semi-dry transfer performs better for SCAMP4.
How should blocking be optimized?
Blocking · Standard workflow guidance: follow the A16237 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 SCAMP4 bands be quantified?
Quantitation · Define the band to measure only after checking its identity and whether the antibody recognizes the relevant isoforms. SCAMP4 has three listed isoforms with substantial sequence differences; combining distinct bands could obscure changes in a particular form. Use the same band definition across samples.
Why might SCAMP4 appear at 68 kDa instead of 25.7 kDa?
Interpretation · The supplied blot observation is 68 kDa, while the canonical sequence has a predicted mass of 25.7 kDa. SCAMP4 is a multi-pass membrane protein with splice variants and a listed phosphorylation site, but those features do not establish the cause of this difference. Verify the 68 kDa band's identity before assigning it to SCAMP4.
Compare each band's behavior with the antibody's epitope and the listed isoform changes. Isoform 2 lacks canonical residues 99–132, while isoform 3 replaces residues 132–229. The listed phosphothreonine at canonical position 194 does not by itself identify an extra band. Confirm band identity independently before attributing it to an isoform or modification.
Compare each band's behavior with the antibody's epitope and the listed isoform changes. Isoform 2 lacks canonical residues 99–132, while isoform 3 replaces residues 132–229. The listed phosphothreonine at canonical position 194 does not by itself identify an extra band. Confirm band identity independently before attributing it to an isoform or modification.
Boster reagents
SCAMP4 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-SCAMP4 Antibody
Cat # A16237
The catalog reports Anti-SCAMP4 Antibody A16237 for Western blot, with stated Human, Mouse, and Rat reactivity. Its WB image shows 3T3 cell lysate tested at 1 and 2 μg/mL; the supplied evidence does not show other sample types.
Which to pick: A16237 is the only listed SCAMP4 antibody. Choose it if its stated reactivity fits your sample; the supplied WB image documents testing in 3T3 cell lysate at 1 and 2 μg/mL.
Source: BosterBio SCAMP4 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry Q969E2.
- Human Protein Atlas. SCAMP4 tissue expression.
- PMC11742877 — target-verified WB comparison