This website uses cookies to ensure you get the best experience on our website.
- Table of Contents
HES5 / Transcription factor HES-5 · IHC design guide
Design Immunohistochemistry for HES5
Plan HES5 paraffin IHC around nuclear staining in brain and testis (HPA tissue IHC). Use strongly stained neuronal cells in the caudate, cerebral cortex and hippocampus as references, and assess signal carefully because presumed off-target staining has been observed (HPA tissue IHC).
Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use
HES5 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 | Nuclear staining in brain and testis (HPA tissue IHC) | |
| Staining pattern | Strong nuclear staining in brain neuronal cells (HPA tissue IHC) | |
| Antigen retrieval | EDTA pH 8.0 HIER, heat-mediated (datasheet A05384-1) | |
| Positive control | Caudate+4 more · see all | |
| Negative control | Adipose tissue+4 more · see all |
Important caveats
Reasons your staining may differ from the expected pattern.
| Fixation | Keep section fixation consistent. (standard IHC practice; not target-specific) | |
| Caveat | Presumed off-target staining has been observed (HPA tissue IHC) | |
| Regulation | Staining intensity varies by tissue (HPA tissue IHC) | |
| Isoform / epitope | No annotated isoforms; one 1–166 chain (UniProt) |
Section 1
Recommended HES5 IHC & IF Protocols
Compare the catalog antibody’s IHC-P protocol (datasheet: A05384-1) with four published HES5 IHC protocols (PMC5806807; PMC2874490; PMC5879899; PMC13477445).
| Sample | Paraffin-embedded human bladder epithelial carcinoma tissue; fixative not specified (datasheet A05384-1) |
| Fixation | Image fixative and duration unreported (datasheet A05384-1); 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 A05384-1); 20 min, 95–100 °C (standard) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet A05384-1) |
| Primary antibody | Rabbit anti-HES5, 2-5 μg/ml (datasheet A05384-1) |
| Primary incubation | Overnight at 4 °C (datasheet A05384-1) |
| Detection | Streptavidin-biotin complex (SABC), DAB chromogen (datasheet A05384-1) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | HES5-positive staining in neuronal cells of caudate (HPA tissue IHC: High). HPA tissue profile: Nuclear expression in brain and testis. No signal in the no-primary control. |
💡Decision noteStart with heat-mediated EDTA pH 8.0 retrieval for the catalog antibody (datasheet: A05384-1); published citrate methods used different antibodies (PMC5806807; PMC2874490).
Section 2
What Is the Expected HES5 Staining Pattern?
HES5 is a nuclear transcription factor with no transmembrane segment (UniProt Q5TA89: nucleus; no transmembrane segment). In paraffin-section IHC, expect nuclear staining in neuronal cells of the caudate, cerebral cortex and hippocampus, where HPA reports high staining (HPA: tissue IHC). HPA describes nuclear expression in brain and testis, but reports only medium consistency between staining and RNA data and notes presumed off-target binding (HPA: Enhanced reliability description).
| Distinct nuclear chromogen in neuronal cells of the caudate, cerebral cortex or hippocampus. | This matches the strongest listed tissue observations: neuronal cells stain at a high level in each region (HPA: tissue IHC). Judge the cellular location as well as the intensity; HES5 is assigned to the nucleus (UniProt Q5TA89: subcellular location). |
| Predominantly cytoplasmic, membranous or extracellular chromogen, with little nuclear staining. | Treat this IHC pattern as suspect because UniProt places HES5 in the nucleus and lists no transmembrane segment or signal peptide (UniProt Q5TA89: location; topology; processing). Review the staining distribution and controls before assigning a biological explanation (standard IHC practice). |
| Strong staining in a cell population listed as undetected, such as adipocytes in adipose tissue. | This conflicts with that population's HPA observation (HPA: adipose-tissue adipocytes, not detected). Consider antibody cross-reactivity or endogenous chromogenic activity; HPA explicitly reports presumed off-target binding in its tissue assessment (HPA: reliability description; standard IHC practice). |
| Diffuse chromogen across tissue, including nuclei and surrounding spaces, without clear cell boundaries. | A diffuse field does not support a cell-specific nuclear call (UniProt Q5TA89: nucleus). Assess no-primary and detection controls, blocking and wash conditions to identify nonspecific or detection-related background (standard IHC practice). |
| No nuclear signal in neuronal cells of a caudate, cerebral cortex or hippocampus section. | An absent result in these high-staining HPA reference cells calls for a technical check, but does not by itself prove failed staining: HPA reports medium consistency with RNA data (HPA: tissue IHC; reliability description). Check tissue identity, primary-antibody use and detection controls (standard IHC practice). |
💡Expected HES5 appearanceA convincing positive is clearly nuclear chromogen in neuronal cells, strongest in the listed high-staining brain regions; isolated diffuse or membrane-dominant color is suspect (HPA: tissue IHC; UniProt Q5TA89: nucleus; standard IHC practice).
| Antibody evidence | HPA lists HPA076164 as IHC Enhanced; its tissue assessment still reports medium staining–RNA consistency and disregarded presumed off-target binding (HPA: antibody validation; reliability description). Interpret a new cell-type pattern against tissue controls rather than treating the validation label as universal specificity (standard IHC practice). |
| Tissue and cell context | HPA reports high neuronal staining in three listed brain regions, medium staining in several other cell populations, and no detection in specified populations (HPA: tissue IHC). Choose the comparison at the cell-population level: a negative entry for one population does not describe every cell in its tissue (HPA: tissue IHC). |
| Protein location and form | HES5 is a nuclear, 166-aa protein with no annotated signal peptide or transmembrane segment (UniProt Q5TA89: chain; location; topology; processing). These annotations support a nuclear interpretation, not a predicted membrane rim or extracellular deposit; they do not establish fixation sensitivity (UniProt Q5TA89: location; topology). |
| Chromogenic detection | With an enzyme-based chromogen, endogenous activity or nonspecific detection can produce color unrelated to the primary antibody (standard IHC practice). Compare appropriate detection controls before calling unexpected staining HES5; HPA's off-target caution makes that check relevant when the pattern differs from its tissue observations (HPA: reliability description). |
| Situation | Likely cause | Next action |
|---|---|---|
| Expected brain-region nuclei appear blank. | The selected section may lack the listed positive neuronal population, or an IHC workflow step may have failed (HPA: tissue IHC; standard IHC practice). | Confirm the neuronal population and run a documented positive section alongside detection controls; review primary-antibody dilution and retrieval against the chosen antibody's IHC instructions (standard IHC practice). No HES5-specific retrieval setting is established here. |
| Color is widespread outside nuclei. | Nonspecific binding or detection background can obscure a nuclear pattern (standard IHC practice; UniProt Q5TA89: nucleus). | Compare no-primary and detection controls, then review blocking, washes and chromogen development (standard IHC practice). Score HES5 only where cellular nuclear staining can be distinguished. |
| A listed negative cell population stains strongly. | The result disagrees with the relevant HPA cell-level observation; presumed off-target binding is a documented limitation of the tissue dataset (HPA: tissue IHC; reliability description). | Check the exact cell identity, inspect controls and repeat with independently supported IHC evidence if available (standard IHC practice). Report the discrepancy rather than reclassifying the HPA population as positive. |
| Only faint, uneven color appears in a high-staining reference region. | Uneven section handling or detection may reduce interpretability (standard IHC practice); HPA's high level is an observed pattern, not a guaranteed intensity in every run (HPA: tissue IHC). | Compare sections processed together, verify consistent reagent coverage and assess the positive control before changing the scoring threshold (standard IHC practice). |
| Nuclear color appears in bronchial respiratory epithelium or lung macrophages. | These cell populations have medium staining in HPA, so their presence alone is not an unexpected tissue result (HPA: bronchus respiratory epithelial cells; lung macrophages). | Score the named cell population and nuclear location separately from background, then compare with a listed high-staining neuronal reference (HPA: tissue IHC; UniProt Q5TA89: nucleus). |
| IF/ICC Q&A: Is cytosolic fluorescence automatically an artifact? | No. HPA approves nucleoplasm as the main ICC-IF location and also lists nuclear speckles and cytosol (HPA: subcellular ICC-IF). | Interpret that fluorescence using the separate IF/ICC guide and its controls; HPA065458 is ICC Approved, while HPA076164 is IHC Enhanced (HPA: antibody validation; standard IF practice). |
Experiment evidence
IHC & IF images showing HES5 staining
A05384-1 · IHCIHC analysis of HES5 using anti-HES5 antibody (A05384-1). HES5 was detected in a paraffin-embedded section of human bladder epithelial carci
A05384-1 · IHCIHC analysis of HES5 using anti-HES5 antibody (A05384-1). HES5 was detected in a paraffin-embedded section of human gall bladder adenosquamo
A05384 · IHCImmunohistochemistry of HES5 in human spleen tissue with HES5 antibody at 5 μg/ml.
A05384 · IHCImmunohistochemistry of HES5 in mouse brain tissue with HES5 Antibody at 5 μg/mL.
A05384 · IFImmunofluorescence of HES5 in human spleen tissue with HES5 antibody at 20 μg/ml.
HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000197921-HES5/tissue/cerebral+cortex#imid_20515331
HPA · CaudateHuman Protein Atlas IHC, Caudate. Source: https://www.proteinatlas.org/ENSG00000197921-HES5/tissue/basal+ganglia#imid_20515317
HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000197921-HES5/tissue/colon#imid_20511001
HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000197921-HES5/tissue/liver#imid_20511010
HPA · ICC-IF HaCaTHuman Protein Atlas immunofluorescence, HaCaT, antibody HPA065458; green = HES5, blue = nucleus, red = microtubules.
HPA · ICC-IF HaCaTHuman Protein Atlas immunofluorescence, HaCaT, antibody HPA065458; green = HES5, blue = nucleus, red = microtubules.
← swipe / scroll for more images →
Real IHC / IF data behind the staining-pattern expectations in this section.
Sample controls for HES5 IHC & IF
🧪Run caudate first and score neuronal cells for nuclear staining (HPA: High in caudate neuronal cells; UniProt Q5TA89: Nucleus). Use adipose tissue adipocytes as the negative tissue (HPA: Not detected in adipocytes); on the caudate slide, cells without neuronal morphology can serve as background comparators, but their HES5-negative status is not established by the supplied HPA row (HPA: High in neuronal cells).
Positive control tissue: Caudate (Neuronal cells, HPA High)
Negative control tissue: Adipose tissue (HPA Not detected)
ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show HES5 in HaCaT, PC-3, U2OS, with annotated localisation: Nucleoplasm (approved) (HPA subcellular).
Technical controls: Include a no-primary, secondary-only control, a rabbit IgG isotype control matched to the primary antibody’s clonality, and HES5 knockout tissue if available (caption: rabbit anti-HES5; standard IHC controls). For the caption’s SABC/DAB detection, block endogenous peroxidase and assess endogenous biotin; inspect caudate neurons for pigment that could be mistaken for chromogen (caption: SABC/DAB; standard IHC practice).
⚠️Feasibility: No target-specific fixation window or fixation effect is reported, and the selected A05384-1 tissue-IHC caption does not state a fixative (caption: fixative not stated). Heat retrieval in EDTA at pH 8.0 is documented for the caption’s paraffin-section bladder carcinoma example, so its performance in caudate requires verification (caption: EDTA retrieval; HPA: High in caudate neuronal cells). The supplied evidence does not establish whether frozen sections or IF are easier; neuronal pigment may complicate chromogenic scoring (HPA: ICC-IF images in HaCaT, PC-3 and U2OS; standard IHC practice).
HPA tissue IHC evidence for HES5
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Enhanced — Medium consistency between antibody staining and RNA expression data. Presumed off target binding observed and disregarded.). 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 |
|---|---|---|---|---|
| Caudate | Neuronal cells | High | Protein (IHC) | HPA → |
| Cerebral cortex | Neuronal cells | High | Protein (IHC) | HPA → |
| Hippocampus | Neuronal cells | High | Protein (IHC) | HPA → |
| Bronchus | Respiratory epithelial cells | Medium | Protein (IHC) | HPA → |
| Cerebellum | Cells in molecular layer | Medium | Protein (IHC) | HPA → |
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adipose tissue | Adipocytes | Not detected | Protein (IHC) | HPA → |
| Appendix | Glandular cells | Not detected | Protein (IHC) | HPA → |
| Bone marrow | Hematopoietic cells | Not detected | Protein (IHC) | HPA → |
| Breast | Adipocytes | Not detected | Protein (IHC) | HPA → |
| Cervix | Squamous epithelial cells | Not detected | Protein (IHC) | HPA → |
Section 3
Advanced HES5 IHC Tips
Troubleshoot HES5 staining by checking nuclear signal, section processing, and cell type against the available tissue evidence (UniProt Q5TA89; HPA tissue IHC).
How should I retrieve HES5 in paraffin sections when nuclear staining is weak?
Start with heat mediated retrieval in EDTA at pH 8.0 for the catalog antibody (datasheet A05384-1). The demonstrated paraffin section workflow then used 10% goat serum block and 2 μg/ml primary antibody overnight at 4°C (datasheet A05384-1). If nuclei remain weak, check deparaffinisation, retrieval heating, and cooling consistency before changing the buffer (standard IHC practice). Compare a positive control section from caudate or cerebral cortex in the same run, scoring neuronal nuclei (HPA: high neuronal staining). Excess retrieval can impair morphology and increase background, so judge signal alongside intact nuclear detail (standard IHC practice).
Could fixation explain weak or uneven HES5 staining in my paraffin sections?
Target specific fixation sensitivity is unknown: the selected paraffin section caption does not report a fixative (datasheet A05384-1). Record the fixative, fixation duration, tissue thickness, and processing history for each section before comparing staining (standard IHC practice). Test sections processed under different documented conditions with identical EDTA pH 8.0 retrieval and primary antibody concentration (datasheet A05384-1; standard IHC practice). Examine nuclear morphology and section edges to distinguish processing variation from a reproducible cell restricted signal (standard IHC practice). Use a concurrently processed positive control; high neuronal staining in caudate and cerebral cortex offers an evidence based comparison (HPA: tissue IHC).
What should I do if HES5 staining is mainly cytoplasmic?
Prioritise crisp nuclear staining when interpreting chromogenic HES5 IHC, because HES5 is annotated as nuclear (UniProt Q5TA89). Nucleoplasm is the approved main location, while nuclear speckles and cytosol are additional approved locations (HPA: subcellular). Accordingly, cytoplasmic colour alone is insufficient: compare its distribution with nuclear signal in the same cell population (HPA: subcellular; standard IHC practice). Check whether DAB colour follows tissue folds, edges, or diffusely stained areas, then repeat with a no primary control (standard IHC practice). Assess neuronal nuclei in caudate or cerebral cortex as a comparison, while recognising that the HPA tissue profile reports presumed off target staining (HPA: tissue IHC).
How can I assess an unexpected HES5 epitope dependent staining pattern?
HES5 has a single annotated 166 residue chain and no listed isoforms, signal peptide, or transmembrane segment (UniProt Q5TA89). Its annotated bHLH domain spans residues 16–72, and its Orange domain spans 88–119 (UniProt Q5TA89). An epitope position is not supplied for the catalog antibody, so do not assign a staining difference to either domain (datasheet A05384-1). Compare retrieval conditions only after confirming the documented EDTA pH 8.0 method and consistent section processing (datasheet A05384-1; standard IHC practice). Use expected nuclear localisation and a no primary control to evaluate specificity; absent isoforms do not establish antibody specificity (UniProt Q5TA89; standard IHC practice).
How should I investigate HES5 by IF alongside chromogenic IHC?
Use IF as a separate validation experiment; the selected antibody evidence here describes chromogenic staining of a paraffin section (datasheet A05384-1). Multiplex HES5 with a neuronal cell marker when examining brain tissue, because neuronal cells stain highly in caudate and cerebral cortex (HPA: tissue IHC). Select fluorophores in spectral channels with low measured tissue autofluorescence, and include single colour and no primary controls (standard IF practice). For a nuclear epitope, permeabilise sufficiently for antibody entry through cellular and nuclear membranes, then assess nuclear colocalisation (UniProt Q5TA89; standard IF practice). HPA also reports nucleoplasmic, speckle, and cytosolic locations, so record each compartment separately (HPA: subcellular).
How do I reduce diffuse DAB background without losing HES5 nuclear signal?
Begin with the documented 10% goat serum block and 2 μg/ml primary antibody incubation overnight at 4°C (datasheet A05384-1). The caption uses a biotinylated secondary, avidin biotin complex, and DAB, so include no primary and secondary only controls (datasheet A05384-1; standard IHC practice). Apply a peroxidase block and check for endogenous biotin related signal where relevant to this detection scheme (standard IHC practice). If diffuse colour persists, optimise wash stringency, antibody concentration, and DAB development using matched sections (standard IHC practice). Retain conditions that preserve discrete nuclei; HPA reports presumed off target tissue staining despite enhanced reliability (HPA: tissue IHC).
What is a defensible way to quantify HES5 IHC across sections? ⚠ ANSWER MARKED FOR VERIFICATION
Define the cell compartment and region before scoring, using nuclei as the primary HES5 readout (UniProt Q5TA89; standard IHC practice). Report the percentage of positive nuclei and, when intensity is reproducible, an H-score using intensity categories 0–3 (standard IHC practice). Alternatively, count positive nuclei per mm², normalised to evaluable tissue area, or divide positive nuclei by all nuclei of the prespecified cell type (standard IHC practice). Keep retrieval, antibody exposure, DAB development, imaging, and threshold settings consistent across comparison sections (standard IHC practice). Exclude folds and necrotic areas, and report cell type because HPA staining varies among neuronal, epithelial, and macrophage populations (HPA: tissue IHC).
How can I distinguish genuine HES5 positivity from staining artefacts?
Seek reproducible nuclear staining in an anatomically plausible cell population, since HES5 is nuclear and HPA reports high neuronal staining in caudate, cortex, and hippocampus (UniProt Q5TA89; HPA: tissue IHC). Treat colour confined to section edges, folds, or necrosis as suspect and inspect the matching morphology (standard IHC practice). Compare no primary and peroxidase blocked controls when DAB colour appears outside cells or tracks endogenous enzyme activity (standard IHC practice). Cytosolic HES5 is reported, but isolated diffuse cytoplasmic colour needs independent support before interpretation (HPA: subcellular; standard IHC practice). The HPA reliability note reports only medium staining to RNA consistency and presumed off target binding, so confirm unexpected cell patterns independently (HPA: tissue IHC).
Boster reagents
Best HES5 / Transcription factor HES-5 IHC Antibodies
The catalog shows HES5 IHC images in human bladder epithelial carcinoma and spleen and mouse brain, plus IF images in human spleen and mouse brain (catalog image captions).
Real IHC data
Anti-HES5 Antibody ®
Cat # A05384-1
Real IHC data
Anti-Transcription factor HES-5 HES5 Antibody
Cat # A05384
A05384-1 has IHC images from paraffin sections of human bladder epithelial carcinoma, gall bladder adenosquamous carcinoma and placenta (A05384-1 image captions). A05384 has IHC and IF images from human spleen and mouse brain (A05384 image captions).
Which to pick: For human paraffin-section IHC, choose A05384-1: its own caption documents EDTA retrieval and staining at 2 μg/ml; the fixative is unreported (A05384-1 IHC caption). For cross-species IHC or tissue IF, choose A05384: it lists human, mouse and rat reactivity and IHC-P and IF applications, with human and mouse tissue images; its image captions do not report a fixative (A05384 catalog and image captions). Neither listing specifies a clone, and ICC validation is not listed (catalog: clone and applications fields).
Each figure is that product's own IHC / IF validation image from its datasheet.
References
- UniProt Consortium. UniProt entry Q5TA89 (HES5_HUMAN, Transcription factor HES-5).
- Human Protein Atlas. HES5 tissue IHC expression (reliability: Enhanced).
- Human Protein Atlas. HES5 subcellular location (ICC-IF): Mainly localized to the nucleoplasm. In addition localized to the nuclear speckles and cytosol..
- Human Protein Atlas. HES5 antibody validation summary (2 antibodies).
- Hyperhomocysteinemia-induced autophagy and apoptosis with downregulation of hairy enhancer of split 1/5 in cortical neurons in mice. International journal of immunopathology and pharmacology 2017 — PMC5806807.
- The expressions of bHLH gene HES1 and HES5 in advanced ovarian serous adenocarcinomas and their prognostic significance: a retrospective clinical study. Journal of cancer research and clinical oncology 2010 — PMC2874490.
- Hyperhomocysteinemia induces injury in olfactory bulb neurons by downregulating Hes1 and Hes5 expression. Neural regeneration research 2018 — PMC5879899.
- Comprehensive molecular profiling of combined hepatocellular carcinoma and cholangiocarcinoma reveals distinct Notch signaling subgroups with prognostic significance. Virchows Archiv : an international journal of pathology 2026 — PMC13477445.
- PubMed PMID:16710414 — UniProt-cited evidence.
- PubMed PMID:15254753 — UniProt-cited evidence.
Immunohistochemistry protocol sheet for HES5 (Transcription factor HES-5). Expected localisation Nuclear staining in brain and testis (HPA tissue IHC). Antigen retrieval: EDTA pH 8.0 HIER, heat-mediated (datasheet A05384-1). Validated IHC antibody: A05384-1 at 2-5 μg/ml (the product's own IHC validation image is shown). Controls (HPA): positive Caudate (Neuronal cells); negative Adipose tissue. IHC-P workflow on paraffin sections; fixative unspecified. Protocol steps: 1. Sample: Paraffin-embedded human bladder epithelial carcinoma tissue; fixative not specified (datasheet A05384-1); 2. Fixation: Image fixative and duration unreported (datasheet A05384-1); 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 A05384-1); 20 min, 95–100 °C (standard); 6. Peroxidase block: 3% H2O2, 10 min , room temperature (standard); 7. Blocking: 10% goat serum (datasheet A05384-1); 8. Primary antibody: Rabbit anti-HES5, 2-5 μg/ml (datasheet A05384-1); 9. Primary incubation: Overnight at 4 °C (datasheet A05384-1). Watch for: Fixation: Keep section fixation consistent. (standard IHC practice; not target-specific); Caveat: Presumed off-target staining has been observed (HPA tissue IHC); Isoform / epitope: No annotated isoforms; one 1–166 chain (UniProt); Regulation: Staining intensity varies by tissue (HPA tissue IHC). Evidence: UniProt Q5TA89, HPA tissue IHC · Enhanced, HPA ICC-IF · Mainly localized to the nucleoplasm. In addition localized to the…, Datasheet A05384-1, PMC5806807, PMC2874490. QR code links to https://www.bosterbio.com/bosterbio-gene-info-cards/HES5/immunohistochemistry-ihc-guide.