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SCD / Stearoyl-CoA desaturase · IHC design guide
Design Immunohistochemistry for SCD
Plan chromogenic IHC on paraffin sections using the general cytoplasmic tissue pattern (HPA tissue IHC) and ER membrane location (UniProt). The catalog antibody has an IHC dilution of 2–5 μg/ml (datasheet A00588-1); interpret staining with HPA’s low staining–RNA consistency in mind (HPA tissue IHC).
Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use
SCD Immunohistochemistry Experimental Design Guide
Expected localisation, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
Must know before staining
| Expected localisation | General cytoplasmic staining (HPA tissue IHC) | |
| Staining pattern | Cytoplasmic staining in adipocytes and glandular cells (HPA tissue IHC) | |
| Antigen retrieval | EDTA pH 8.0 HIER, heat-mediated (datasheet A00588-1) | |
| Positive control | Adipose tissue+4 more · see all | |
| Negative control | None in HPA (detected in all 45 tissues); use no-primary + isotype controls |
Important caveats
Reasons your staining may differ from the expected pattern.
| Fixation | Keep fixation consistent across sections (standard IHC practice; not target-specific); Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image A00588-1) | |
| Caveat | Staining has low consistency with RNA expression (HPA tissue IHC) | |
| Regulation | Higher expression in adult adipose tissue (UniProt) | |
| Isoform / epitope | No annotated isoforms; cytoplasmic vs ER-lumenal epitopes may matter (UniProt) |
Section 1
Recommended SCD IHC & IF Protocols
Compare the catalog antibody’s IHC-P protocol (datasheet: A00588-1) with published colon and ovarian carcinoma IHC protocols (PMC13566249; PMC8469522).
| Sample | Paraffin-embedded human placenta tissue; fixative not specified (datasheet A00588-1) |
| Fixation | Image fixative and duration unreported (datasheet A00588-1); verify before use. |
| Sectioning | 4–5 µm sections on charged slides (standard) |
| Deparaffinisation | Xylene, graded ethanol series to water (standard) |
| Antigen retrieval | Heat retrieval: EDTA pH 8.0 (datasheet A00588-1); 20 min, 95–100 °C (standard) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet A00588-1) |
| Primary antibody | Rabbit anti-SCD, 2-5 μg/ml (datasheet A00588-1) |
| Primary incubation | Overnight at 4 °C (datasheet A00588-1) |
| Detection | HRP-conjugated secondary, DAB chromogen (datasheet A00588-1) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | SCD-positive staining in adipocytes of adipose tissue (HPA tissue IHC: High). HPA tissue profile: General cytoplasmic expression. No signal in the no-primary control. |
💡Decision noteStart with heat-mediated EDTA pH 8.0 for the catalog antibody (datasheet: A00588-1). Citrate pH 6.0 was used with a different SCD antibody (PMC13566249).
Section 2
What Is the Expected SCD Staining Pattern?
SCD is a four-pass endoplasmic reticulum membrane protein, so positive cells should show cytoplasmic rather than nuclear staining (UniProt O00767 topology; HPA: general cytoplasmic IHC expression). HPA reports high staining in adipocytes, selected glandular and respiratory epithelial cells, and selected brain cells (HPA: tissue IHC). Its tissue IHC profile is Approved, with low consistency between antibody staining and RNA expression (HPA: tissue IHC reliability).
| Cytoplasmic staining in adipocytes or other HPA-listed positive cell types, with discernible cell boundaries. | This fits the reported IHC pattern; the ER membrane location supports a cytoplasmic distribution (HPA: tissue IHC; UniProt O00767 subcellular location). Judge intensity within the relevant cell population: HPA reports High adipocyte staining, but its Approved profile has low staining–RNA consistency (HPA: tissue IHC). |
| Predominantly nuclear staining, or a pattern confined to an unrelated compartment. | That distribution conflicts with the annotated ER membrane location and HPA’s general cytoplasmic IHC pattern (UniProt O00767 subcellular location; HPA: tissue IHC). Treat it as possible nonspecific staining or a staining artefact; review controls before scoring those cells as SCD positive (general IHC practice). |
| Strong staining in a cell population outside the expected population for the tissue being assessed. | Check the tissue’s HPA cell-level pattern before assigning SCD: staining in an unexpected cell type can reflect cross-reactivity or endogenous detection activity (HPA: tissue IHC; general chromogenic IHC practice). HPA’s supplied list is limited to selected positive tissues, so an unlisted cell type alone does not establish a false positive (HPA: supplied tissue IHC profile). |
| Diffuse color across cells and extracellular areas, with little separation between positive and background regions. | This is difficult to interpret as the reported cytoplasmic pattern (HPA: tissue IHC). General chromogenic IHC causes include inadequate blocking, excess antibody or detection reagent, and incomplete washing; compare a no-primary control before assigning cellular positivity (general IHC practice). |
| No cellular signal in an adipose section expected to contain positive adipocytes. | HPA reports High staining in adipocytes, making them a useful positive reference, although its tissue IHC reliability notes low staining–RNA consistency (HPA: adipose tissue IHC; HPA: reliability). First assess tissue preservation, positive-control performance, retrieval, and detection as workflow checks; no SCD-specific retrieval or fixation response is supplied (general IHC practice; supplied UniProt/HPA record). |
💡Expected SCD appearanceCall SCD positive when relevant cells show clear cytoplasmic staining, especially High staining in HPA-listed adipocytes; isolated nuclear color or diffuse background without cell-level localization is suspect (HPA: tissue IHC; UniProt O00767 ER location; general IHC practice).
| Membrane topology and unknown antibody epitope (UniProt O00767 topology; supplied record). | SCD has four membrane spans and cytoplasmic and short lumenal regions (UniProt O00767 topology). The supplied data do not map an antibody epitope, so topology alone cannot predict which retrieval or permeabilization condition will expose it (supplied UniProt/HPA record). |
| Tissue pattern and validation strength (HPA: tissue IHC; HPA: antibodies). | HPA lists High staining in adipocytes, adrenal and other glandular cells, respiratory epithelium, and selected brain cells (HPA: tissue IHC). The tissue profile is Approved with low staining–RNA consistency; HPA012107 is IHC Approved, while no IHC status is supplied for HPA063921 (HPA: reliability; HPA: antibodies). |
| Processing and isoforms (UniProt O00767 processing; supplied record). | UniProt lists one chain spanning residues 1–359, no signal peptide or propeptide, and no annotated isoforms (UniProt O00767 processing; supplied record). These annotations provide no basis for expecting a cleaved or shed staining product; they do not identify the antibody epitope (UniProt O00767 processing; supplied record). |
| Chromogenic detection controls (general IHC practice). | Endogenous enzyme activity can resemble specific color when the detection system uses an enzyme chromogen (general chromogenic IHC practice). Interpret unexpected staining alongside a no-primary control and the relevant detection-system control; this is a general workflow issue, not an SCD-specific activity claim (general IHC practice). |
| IF/ICC Q: What localization should be expected? (HPA: subcellular ICC-IF). | A: HPA reports SCD mainly in the endoplasmic reticulum, with ER as its enhanced main location (HPA: subcellular ICC-IF). That supports an ER-associated cytoplasmic fluorescence pattern; it does not supply an IF protocol for paraffin-section IHC (HPA: subcellular ICC-IF; supplied record). |
| Situation | Likely cause | Next action |
|---|---|---|
| No signal in adipocytes expected to stain strongly (HPA: adipose tissue IHC). | A failed staining run, ineffective retrieval, or detection failure is possible; the supplied sources do not establish SCD-specific fixation or retrieval sensitivity (general IHC practice; supplied UniProt/HPA record). | Check the run’s positive control, antibody and detection steps, and the retrieval condition used for that assay before interpreting the section as negative (general IHC practice). |
| Nuclear staining dominates the slide (UniProt O00767 ER location; HPA: cytoplasmic IHC profile). | The pattern is inconsistent with the annotated location and may reflect nonspecific binding or an artefact (UniProt O00767 subcellular location; HPA: tissue IHC; general IHC practice). | Review the no-primary control and antibody concentration, then score only staining with credible cellular localization (general IHC practice). |
| Unexpected cells stain more strongly than the relevant HPA-listed cells (HPA: tissue IHC). | Cross-reactivity or endogenous chromogenic activity is possible; the supplied HPA list does not establish every cell type that can express SCD (general IHC practice; HPA: supplied tissue IHC profile). | Confirm cell identity on the counterstained section, compare HPA’s cell-level tissue pattern, and inspect detection controls (HPA: tissue IHC; general IHC practice). |
| Color is diffuse across the section (HPA: general cytoplasmic IHC profile). | High background can obscure the reported cellular pattern; excess reagent, insufficient blocking, or incomplete washes are general possibilities (HPA: tissue IHC; general IHC practice). | Compare the no-primary control and adjust blocking, reagent concentration, or washes according to the assay’s validated workflow (general IHC practice). |
| Adipocyte staining is hard to distinguish from surrounding color (HPA: High in adipocytes). | Adipocytes have limited visible cytoplasm around lipid spaces, so weak cellular color can be difficult to separate from background (general histology practice). | Inspect the thin cytoplasmic rim and neighboring cells at appropriate magnification, compare the no-primary control, and avoid scoring color in empty lipid spaces as SCD (general histology and IHC practice). |
Experiment evidence
IHC & IF images showing SCD staining
A00588-1 · IHCIHC analysis of SCD using anti-SCD antibody (A00588-1). SCD was detected in a paraffin-embedded section of human placenta tissue. Heat media
A00588-1 · IHCIHC analysis of SCD using anti-SCD antibody (A00588-1). SCD was detected in a paraffin-embedded section of human rectum adenocarcinoma tissu
A00588-2 · IFIF analysis of SCD using anti-SCD antibody (A00588-2). SCD was detected in an immunocytochemical section of A549 cells. Enzyme antigen retri
HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000099194-SCD/tissue/cerebral+cortex#imid_3237000
HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000099194-SCD/tissue/colon#imid_3236942
HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000099194-SCD/tissue/liver#imid_3236927
HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000099194-SCD/tissue/kidney#imid_3236928
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA012107; green = SCD, blue = nucleus, red = microtubules.
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA012107; green = SCD, blue = nucleus, red = microtubules.
← swipe / scroll for more images →
Real IHC / IF data behind the staining-pattern expectations in this section.
Sample controls for SCD IHC & IF
🧪Run adipose tissue first; adipocytes should stain (HPA: High in adipocytes). HPA detects SCD in all 45 scored tissues, so use no-primary and isotype controls instead of a negative tissue; any unstained nonadipocyte cells on the positive slide should show only background, but cannot be assumed SCD-negative without validation (HPA: no negative tissue listed).
Positive control tissue: Adipose tissue (Adipocytes, HPA High)
Negative control tissue: None in HPA: SCD is detected in all 45 scored tissues. Use a no-primary (secondary-only) and an isotype control instead.
ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show SCD in A-431, U-251MG, U2OS, MCF-7, SK-MEL-30, HEK293, with annotated localisation: Endoplasmic reticulum (enhanced) (HPA subcellular).
Technical controls: Include a no-primary, secondary-only slide and a concentration-matched, nonimmune rabbit IgG isotype control for the rabbit primary (selected-SKU caption: rabbit anti-SCD); use matched SCD-knockout material as a biological negative where available. Quench endogenous peroxidase for HRP–DAB detection, and assess background around adipocyte lipid vacuoles (selected-SKU caption: HRP–DAB; HPA: High in adipocytes).
⚠️Feasibility: The selected-SKU paraffin-section caption reports EDTA retrieval at pH 8.0, but its fixative is unreported; no target-specific fixation window or fixation effect is reported (selected-SKU caption). Retrieval was used in that example, but a requirement for all specimens is unestablished; HPA documents ER localisation by ICC-IF, while the supplied evidence does not establish that IF or frozen sections are easier than paraffin IHC (selected-SKU caption; HPA: endoplasmic reticulum, enhanced). In adipose tissue, lipid vacuoles leave thin cytoplasmic rims, so score staining in preserved adipocyte cytoplasm rather than treating empty vacuoles as negative cells (HPA: High in adipocytes; UniProt O00767: ER membrane).
HPA tissue IHC evidence for SCD
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Approved — Low consistency between antibody staining and RNA expression data.). 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 |
|---|---|---|---|---|
| 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 → |
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| None in HPA: SCD is detected in all 45 scored tissues. Use a no-primary (secondary-only) and an isotype control instead. | ||||
Section 3
Advanced SCD IHC Tips
Troubleshoot SCD staining in paraffin sections by checking retrieval, cell identity and the expected endoplasmic reticulum pattern (datasheet A00588-1; UniProt O00767 topology).
Which retrieval conditions should I try first when SCD staining is weak?
Start with heat-mediated retrieval in EDTA at pH 8.0 for paraffin sections (datasheet A00588-1). The selected image used this retrieval before 2 μg/ml primary antibody overnight at 4°C, so keep those conditions as the reference when investigating weak DAB signal (datasheet A00588-1). Compare shorter and longer heating exposures on adjacent sections while holding antibody concentration and DAB development constant; inspect morphology because excessive retrieval can damage tissue or increase background (standard IHC practice). Adipocytes can serve as a positive tissue reference because HPA reports high staining there, but its tissue staining has low consistency with RNA expression (HPA: adipocytes High; reliability description).
How should I assess whether fixation caused weak SCD staining?
Target-specific fixation sensitivity is unknown: the selected paraffin-section caption does not report a fixative (datasheet A00588-1). Record the fixation reagent, duration, specimen thickness and processing history for each sample, then compare matched sections using EDTA at pH 8.0 and identical detection conditions (standard IHC practice; datasheet A00588-1). If staining varies between samples, assess tissue preservation and compare processing records before attributing the difference to SCD abundance (standard IHC practice). Use the reported 2 μg/ml primary incubation overnight at 4°C as a staining reference, while treating fixation tolerance as untested for this antibody (datasheet A00588-1).
What cellular staining pattern is plausible for SCD in chromogenic sections?
Expect cytoplasmic staining compatible with an endoplasmic reticulum membrane protein, rather than treating diffuse color anywhere in a section as specific signal (UniProt O00767 subcellular location; HPA: general cytoplasmic expression). A perinuclear or reticular impression may support that assignment, but DAB microscopy does not resolve individual ER membranes reliably (standard IHC practice). SCD has 4 annotated transmembrane segments, with substantial cytoplasmic regions, so the antibody's unknown epitope limits predictions about staining after retrieval (UniProt O00767 topology). Compare staining within the expected cell population against adjacent negative controls and preserved morphology, and investigate strong nuclear-only staining as a localisation mismatch (UniProt O00767 subcellular location; standard IHC practice).
Can isoforms or epitope orientation explain inconsistent SCD IHC?
The supplied record annotates 0 isoforms and a 359-residue chain, so an isoform-specific explanation lacks support here (UniProt O00767 isoforms and processing). Its 4 membrane-spanning segments separate cytoplasmic regions from short lumenal loops, making epitope position relevant to antibody access after processing (UniProt O00767 topology; standard IHC practice). The record lists phosphoserines at 198 and 203, but the catalog antibody's epitope is unspecified; do not assign staining differences to phosphorylation without direct evidence (UniProt O00767 modified residues; datasheet A00588-1). Check the antibody's epitope documentation and compare matched positive and no-primary sections before changing retrieval or interpretation (standard IHC practice).
How can I assess SCD localisation in a multiplex IF follow-up?
Use this as a separate IF assessment: the supplied product image demonstrates paraffin-section chromogenic IHC, while HPA reports an enhanced endoplasmic reticulum location from subcellular imaging (datasheet A00588-1; HPA subcellular). Pair SCD with a marker identifying the cell population under study; adipocytes are a supported tissue reference because HPA reports high SCD staining in them (HPA: adipocytes High; standard IF practice). Choose fluorophores after checking tissue autofluorescence, favoring a spectrally separated channel for the weaker signal and including single-stain controls (standard IF practice). Select permeabilisation after establishing whether the antibody epitope faces the cytoplasm or ER lumen; SCD spans the membrane 4 times, but this antibody's epitope is unspecified (UniProt O00767 topology; datasheet A00588-1; standard IF practice).
How do I separate SCD signal from DAB background?
The selected IHC image used 10% goat serum blocking, a peroxidase-conjugated secondary antibody and DAB development (datasheet A00588-1). Include a no-primary control and apply an endogenous peroxidase block as general chromogenic IHC steps, particularly when unexplained brown signal appears outside intact cells (standard IHC practice). If background rises with signal, compare adjacent sections at the reported 2 μg/ml primary concentration and a lower concentration while keeping retrieval, secondary incubation and DAB development consistent (datasheet A00588-1; standard IHC practice). Review edges, folds and damaged areas separately from viable tissue, since staining concentrated in those regions can reflect processing artefact rather than the ER-associated pattern expected for SCD (UniProt O00767 subcellular location; standard IHC practice).
What should I measure when comparing SCD staining across sections? ⚠ ANSWER MARKED FOR VERIFICATION
Define the cell population and viable tissue region before scoring, then use the same DAB exposure, imaging settings and intensity thresholds across samples (standard IHC practice). An H-score combines the percentage of cells at each intensity, from 0 to 3, and runs from 0 to 300; report the percentage positive as a companion measure (standard IHC practice). For spatial comparisons, report positive-cell density per mm² of viable tissue or within the defined cell compartment, and normalize intensity summaries to the cells actually scored (standard IHC practice). Keep adipocytes distinct from other cells when relevant because HPA reports high adipocyte staining, and interpret between-tissue comparisons cautiously given its low staining–RNA consistency (HPA: adipocytes High; reliability description).
Which findings support genuine SCD staining rather than artefact?
A credible signal should occur in intact cells with cytoplasmic staining compatible with SCD's endoplasmic reticulum membrane location (UniProt O00767 subcellular location; HPA: general cytoplasmic expression). High staining in adipocytes is a useful positive reference, although HPA flags low consistency between antibody staining and RNA expression, so that pattern alone cannot establish specificity (HPA: adipocytes High; reliability description). Treat nuclear-only color, staining confined to section edges or necrotic regions, and widespread color in the no-primary control as reasons to investigate localisation or processing artefact (UniProt O00767 subcellular location; standard IHC practice). Check endogenous peroxidase blocking when DAB appears in unexpected cells, then compare matched sections before assigning biological meaning to intensity differences (standard IHC practice).
Boster reagents
Best SCD / Stearoyl-CoA desaturase IHC Antibodies
Anti-SCD antibodies have real images for human paraffin-section IHC and A549 cell IF/ICC (catalog: A00588-1 IHC captions; A00588-2 IF caption).
Real IHC data
Anti-SCD Antibody ®
Cat # A00588-1
Real IF data
Anti-SCD Antibody ®
Cat # A00588-2
A00588-1 is listed for human IHC, with paraffin-section images from placenta, rectum adenocarcinoma, and liver cancer (catalog: applications, reactivity, IHC captions). A00588-2 is listed for human IF/ICC, with an image from A549 cells (catalog: applications, reactivity, IF caption).
Which to pick: Choose A00588-1 for human paraffin-section IHC because its own images document that preparation; the fixative is unreported (catalog: A00588-1 IHC captions). Choose A00588-2 for human IF/ICC because its application list and A549 image support it (catalog: A00588-2 applications and IF caption). Neither SKU has documented cross-species reactivity, and clonality is unreported for both (catalog: reactivity and clone fields).
Each figure is that product's own IHC / IF validation image from its datasheet.
References
- UniProt Consortium. UniProt entry O00767 (SCD_HUMAN, Stearoyl-CoA desaturase).
- Human Protein Atlas. SCD tissue IHC expression (reliability: Approved).
- Human Protein Atlas. SCD subcellular location (ICC-IF): Mainly localized to the endoplasmic reticulum..
- Human Protein Atlas. SCD antibody validation summary (2 antibodies).
- Clinicopathological Significance of SCD Expression in Colon Adenocarcinoma: Association with Histological Grade and Exploratory Assessment in Relation to PCNA. Journal of clinical medicine 2026 — PMC13566249.
- Compensatory increases in tear volume and mucin levels associated with meibomian gland dysfunction caused by stearoyl-CoA desaturase-1 deficiency. Scientific reports 2018 — PMC5820245.
- Consequences of β-Thalassemia or Sickle Cell Disease for Ovarian Follicle Number and Morphology in Girls Who Had Ovarian Tissue Cryopreserved. Frontiers in endocrinology 2020 — PMC7844814.
- Lipidomic Analysis of Archival Pathology Specimens Identifies Altered Lipid Signatures in Ovarian Clear Cell Carcinoma. Metabolites 2021 — PMC8469522.
- PubMed PMID:10229681 — UniProt-cited evidence.
- PubMed PMID:14702039 — UniProt-cited evidence.
- PubMed PMID:15164054 — UniProt-cited evidence.
Immunohistochemistry protocol sheet for SCD (Stearoyl-CoA desaturase). Expected localisation General cytoplasmic staining (HPA tissue IHC). Antigen retrieval: EDTA pH 8.0 HIER, heat-mediated (datasheet A00588-1). Validated IHC antibody: A00588-1 at 2-5 μg/ml (the product's own IHC validation image is shown). Controls (HPA): positive Adipose tissue (Adipocytes); negative None in HPA (detected in all 45 tissues); use no-primary + isotype controls. IHC-P workflow on paraffin sections; fixative unspecified. Protocol steps: 1. Sample: Paraffin-embedded human placenta tissue; fixative not specified (datasheet A00588-1); 2. Fixation: Image fixative and duration unreported (datasheet A00588-1); verify before use.; 3. Sectioning: 4–5 µm sections on charged slides (standard); 4. Deparaffinisation: Xylene, graded ethanol series to water (standard); 5. Antigen retrieval: Heat retrieval: EDTA pH 8.0 (datasheet A00588-1); 20 min, 95–100 °C (standard); 6. Peroxidase block: 3% H2O2, 10 min , room temperature (standard); 7. Blocking: 10% goat serum (datasheet A00588-1); 8. Primary antibody: Rabbit anti-SCD, 2-5 μg/ml (datasheet A00588-1); 9. Primary incubation: Overnight at 4 °C (datasheet A00588-1). Watch for: Fixation: Keep fixation consistent across sections (standard IHC practice; not target-specific); Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image A00588-1); Caveat: Staining has low consistency with RNA expression (HPA tissue IHC); Isoform / epitope: No annotated isoforms; cytoplasmic vs ER-lumenal epitopes may matter (UniProt); Regulation: Higher expression in adult adipose tissue (UniProt). Evidence: UniProt O00767, HPA tissue IHC · Approved, HPA ICC-IF · Mainly localized to the endoplasmic reticulum., Datasheet A00588-1, PMC13566249, PMC8469522. QR code links to https://www.bosterbio.com/bosterbio-gene-info-cards/SCD/immunohistochemistry-ihc-guide.