This website uses cookies to ensure you get the best experience on our website.
- Table of Contents
TRIM68 / E3 ubiquitin-protein ligase TRIM68 · IHC design guide
Design Immunohistochemistry for TRIM68
Start paraffin-section TRIM68 IHC with the catalog antibody at 1:100 (datasheet: IHC image). Compare high staining in adrenal gland glandular cells with undetected staining in spleen red-pulp cells, while accounting for uncertain tissue-IHC reliability (HPA tissue IHC).
Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use
TRIM68 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 | Tissue: cytoplasmic (HPA tissue IHC); molecular: nuclear/perinuclear (UniProt) | |
| Staining pattern | General cytoplasmic staining across tissue cell types (HPA tissue IHC) | |
| Antigen retrieval | Tris-EDTA pH 9.0 HIER, 95–98 °C, 20 min (rule: nuclear antigen) | |
| Positive control | Adrenal gland+4 more · see all | |
| Negative control | Spleen |
Important caveats
Reasons your staining may differ from the expected pattern.
| Fixation | Keep fixation conditions consistent across paraffin sections (standard IHC practice; not target-specific) | |
| Caveat | Tissue staining has uncertain RNA consistency (HPA tissue IHC) | |
| Regulation | Androgen-dependent up-regulation possible (UniProt) | |
| Isoform / epitope | 2 isoforms; intracellular epitope coverage needs checking (UniProt) |
Section 1
Recommended TRIM68 IHC & IF Protocols
The catalog antibody’s IHC-P protocol (datasheet) is accompanied by one published TRIM68 tissue-staining workflow (PMC8101494).
| Sample | Paraffin-embedded human brain tissue; fixative not specified (datasheet A11532) |
| Fixation | Image fixative and duration unreported (datasheet A11532); verify before use. |
| Sectioning | 4–5 µm sections on charged slides (standard) |
| Deparaffinisation | Xylene, graded ethanol series to water (standard) |
| Antigen retrieval | Heat-induced epitope retrieval in Tris-EDTA buffer, pH 9.0, 20 min at 95–98 °C (standard rule: nuclear antigen) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% normal serum of the secondary host, 30 min, room temperature (standard) |
| Primary antibody | Rabbit anti-TRIM68, 1:100 (datasheet A11532) |
| Primary incubation | Overnight at 4 °C (standard) |
| Detection | HRP-polymer secondary, DAB chromogen 5–10 min (standard) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | TRIM68-positive staining in glandular cells of adrenal gland (HPA tissue IHC: High). HPA tissue profile: General cytoplasmic expression. No signal in the no-primary control. |
💡Decision noteStart with Tris-EDTA HIER at pH 9.0, 95–98 °C for 20 min (page retrieval rule; UniProt Q6AZZ1: nuclear localization).
Section 2
What Is the Expected TRIM68 Staining Pattern?
TRIM68 is expected mainly in cytoplasm, sometimes near the nucleus, and may also appear in nuclei (UniProt Q6AZZ1); ICC-IF supports nucleoplasmic and cytosolic localization (HPA: ICC-IF supported). In paraffin-section IHC, look first at glandular and respiratory epithelial cells and selected glial cells reported as high (HPA: tissue IHC). Treat intensity as a guide rather than a guarantee: the tissue IHC profile has uncertain reliability (HPA: tissue IHC, Uncertain).
| Cytoplasmic staining, with possible nuclear staining, in glandular or respiratory epithelial cells. | This fits the reported general cytoplasmic tissue profile (HPA: tissue IHC) and cytoplasmic plus nuclear localization (UniProt Q6AZZ1). Score the two compartments separately; nuclear signal can be plausible and need not match cytoplasmic intensity in every cell (UniProt Q6AZZ1). |
| Strong signal confined to cell borders, lumina, or extracellular material, with little intracellular staining. | That distribution does not fit the reported cytoplasmic, nuclear, or nucleoplasmic locations (UniProt Q6AZZ1; HPA: tissue IHC and ICC-IF). Check morphology, the negative reagent control, and chromogen deposits before assigning it to TRIM68 (standard IHC practice). |
| Prominent staining in spleen red-pulp cells while the expected intracellular pattern is absent. | HPA reports TRIM68 as not detected in spleen red-pulp cells (HPA: tissue IHC). Consider cross-reactivity or endogenous chromogenic activity, especially if the staining also appears in a no-primary control (standard IHC practice). The HPA IHC profile is uncertain, so this is a warning sign, not proof of nonspecificity (HPA: tissue IHC, Uncertain). |
| Uniform haze across cells, stroma, and blank areas, obscuring cell boundaries. | A slide-wide haze is difficult to reconcile with a localized intracellular result (UniProt Q6AZZ1; HPA: tissue IHC). Review blocking, wash steps, antibody concentration, and detection controls as general IHC background checks (standard IHC practice). Do not score the haze as a TRIM68-positive cell population. |
| No intracellular signal in a section containing intact adrenal glandular or bronchial respiratory epithelial cells. | Both cell populations were reported as high in HPA tissue IHC (HPA: adrenal gland and bronchus), so first check section quality and whether the detection run worked (standard IHC practice). A negative result alone does not overturn target expression: HPA rates this IHC profile uncertain, and individual samples may differ (HPA: tissue IHC, Uncertain). |
💡Expected TRIM68 appearanceCall a result positive when defined cells show mainly cytoplasmic staining, with possible nuclear signal, in populations reported as high such as adrenal glandular or bronchial respiratory epithelial cells (HPA: tissue IHC; UniProt Q6AZZ1); strong acellular or border-only color is suspect (standard IHC practice).
| Tissue and cell selection | HPA reports high staining in several glandular populations, bronchial respiratory epithelium, and selected brain cells; spleen red-pulp cells were not detected (HPA: tissue IHC). Use cell-level morphology when comparing sections, since HPA also describes low tissue RNA specificity and uncertain IHC reliability (HPA: tissue IHC). |
| Compartment assignment | UniProt lists cytoplasm, including the perinuclear region, and nucleus (UniProt Q6AZZ1). Supported ICC-IF locations are nucleoplasm and cytosol (HPA: ICC-IF). In chromogenic IHC, identify nuclei with a counterstain before deciding whether color is nuclear, perinuclear, or overlapping cytoplasm (standard IHC practice). |
| Isoforms and antibody epitope | Two isoforms are listed (UniProt Q6AZZ1). The supplied record gives no antibody epitope or isoform coverage, so an isoform-specific explanation for tissue differences cannot be assigned. Compare staining with the antibody's stated validation and the observed cell morphology (HPA: HPA023455 IHC Uncertain; standard IHC practice). |
| IHC evidence strength | The HPA tissue profile is rated Uncertain, with medium consistency between antibody staining and RNA expression; HPA023455 is also IHC Uncertain (HPA: tissue IHC and antibodies). Treat the listed high and undetected categories as reference observations, and require appropriate slide controls before interpreting an unexpected result (standard IHC practice). |
| ICC-IF Q: Should its location establish an IHC result? | A: ICC-IF supports nucleoplasm and cytosol, and HPA023455 is ICC Supported (HPA: ICC-IF and antibodies). This helps assess plausible compartments, but tissue IHC remains Uncertain (HPA: tissue IHC and antibodies); evaluate paraffin-section staining on its own controls. |
| Situation | Likely cause | Next action |
|---|---|---|
| Expected positive cells are blank. | The detection run or tissue preservation may have failed; a single negative section is inconclusive (standard IHC practice). | Check a run-level positive control and morphology, then review retrieval and detection conditions as general IHC steps (standard IHC practice). Compare with HPA high cell populations cautiously because tissue IHC reliability is Uncertain (HPA: tissue IHC). |
| Color appears mainly on cell edges or in lumina. | The pattern conflicts with reported intracellular locations (UniProt Q6AZZ1; HPA: ICC-IF). Deposited chromogen or nonspecific binding is possible (standard IHC practice). | Inspect a no-primary control and adjacent morphology; repeat staining only after identifying whether the signal follows cells or extracellular material (standard IHC practice). |
| Spleen red-pulp cells stain strongly. | HPA lists these cells as not detected (HPA: tissue IHC); endogenous detection activity or antibody cross-reactivity could contribute (standard IHC practice). | Compare a no-primary control and assess endogenous enzyme blocking for the chromogenic system (standard IHC practice). Interpret the discrepancy cautiously because the HPA tissue IHC profile is Uncertain (HPA: tissue IHC). |
| The whole section has diffuse brown background. | Excess reagent, incomplete washing, or endogenous detection activity can obscure cellular staining (standard IHC practice). | Check reagent controls, wash steps, blocking, and the working antibody concentration (standard IHC practice). Score TRIM68 only where signal resolves into the intracellular pattern supported by UniProt and HPA (UniProt Q6AZZ1; HPA: tissue IHC). |
| Nuclear signal seems unexpectedly strong. | Nuclear localization is plausible; UniProt also reports colocalization with AR in nuclei (UniProt Q6AZZ1). The IHC tissue profile does not establish a required nuclear intensity (HPA: tissue IHC). | Use the counterstain to confirm that color lies within nuclei, compare the cytoplasmic signal, and review controls before calling it artefact (standard IHC practice). |
| Different tissues give inconsistent intensities. | HPA reports both high and undetected cell populations while rating its tissue IHC profile Uncertain (HPA: tissue IHC). | Record tissue, cell type, compartment, and staining intensity separately; compare matched controls and avoid treating one HPA intensity category as a universal threshold (HPA: tissue IHC; standard IHC practice). |
Experiment evidence
IHC & IF images showing TRIM68 staining
A11532 · IHCImmunohistochemical analysis of paraffin-embedded human-brain, antibody was diluted at 1:100
HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000167333-TRIM68/tissue/cerebral+cortex#imid_5997408
HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000167333-TRIM68/tissue/colon#imid_5997342
HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000167333-TRIM68/tissue/liver#imid_5997335
HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000167333-TRIM68/tissue/kidney#imid_5997344
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA023455; green = TRIM68, blue = nucleus, red = microtubules.
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA023455; green = TRIM68, blue = nucleus, red = microtubules.
← swipe / scroll for more images →
Real IHC / IF data behind the staining-pattern expectations in this section.
Sample controls for TRIM68 IHC & IF
🧪Run adrenal gland first: glandular cells should stain (HPA: High in adrenal gland glandular cells). Run spleen as the negative tissue (HPA: Not detected in red-pulp cells); on the adrenal slide, use non-glandular cells that show only background chromogen as internal comparators, without assuming that all such cells are TRIM68-negative.
Positive control tissue: Adrenal gland (Glandular cells, HPA High)
Negative control tissue: Spleen (HPA Not detected)
ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show TRIM68 in A-431, U-251MG, U2OS, with annotated localisation: Nucleoplasm (supported), Cytosol (supported) (HPA subcellular).
Technical controls: Include no-primary (secondary-only) and host-species-matched isotype controls, plus TRIM68-knockout material or a validated immunizing-peptide block as a biological negative (standard IHC practice). Check adrenal sections for blood-associated endogenous peroxidase signal with the no-primary control (standard IHC practice).
⚠️Feasibility: No supplied target or application evidence reports a TRIM68-specific fixation window or retrieval dependency; optimize antigen retrieval for paraffin IHC (standard IHC practice). The selected A11532 paraffin-section caption reports human brain at 1:100 but leaves the fixative unreported, so it does not establish fixation (selected-SKU caption). Frozen sections or IF cannot be judged easier from these data; for IF interpretation, nucleoplasm and cytosol are supported locations (HPA subcellular). The selected A11532 tissue-IHC caption documents paraffin sections, but does not specify the fixative (selected-SKU IHC image A11532).
HPA tissue IHC evidence for TRIM68
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Uncertain — Medium 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 |
|---|---|---|---|---|
| Adrenal gland | Glandular cells | High | Protein (IHC) | HPA → |
| Appendix | Glandular cells | High | Protein (IHC) | HPA → |
| Breast | Glandular cells | High | Protein (IHC) | HPA → |
| Bronchus | Respiratory epithelial cells | High | Protein (IHC) | HPA → |
| Caudate | Glial cells | High | Protein (IHC) | HPA → |
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Spleen | Cells in red pulp | Not detected | Protein (IHC) | HPA → |
Section 3
Advanced TRIM68 IHC Tips
Troubleshoot TRIM68 chromogenic IHC in paraffin sections using the selected image, the page retrieval setting, and compartment and tissue evidence (caption A11532; page setting; UniProt Q6AZZ1; HPA).
How should I adjust retrieval when TRIM68 staining is weak or uneven?
Start with Tris-EDTA at pH 9.0, heated to 95–98 °C for 20 min (page setting: nuclear antigen rule). The selected paraffin-section image reports antibody dilution of 1:100, but gives no retrieval method, so treat this setting as a starting condition rather than image-validated retrieval (caption A11532). If signal is weak, compare freshly prepared buffer and consistent heating across slides before changing retrieval chemistry (standard IHC practice). Assess both cytoplasmic and nuclear staining, since TRIM68 has reported perinuclear cytoplasmic and nuclear localisation (UniProt Q6AZZ1), and compare morphology and background alongside intensity (standard IHC practice).
Could fixation explain weak TRIM68 staining in my paraffin sections?
TRIM68-specific sensitivity to fixation is unknown because the selected paraffin-section caption does not state a fixative or fixation duration (caption A11532). Record the fixative, time to fixation, fixation duration and processing history for each specimen before comparing staining between blocks (standard IHC practice). If those conditions vary, assess comparable regions in separately processed blocks and review tissue morphology while holding retrieval and antibody dilution constant (standard IHC practice). The reported cytoplasmic and nuclear localisation describes where signal may occur; it does not establish how either compartment responds to fixation (UniProt Q6AZZ1).
Should TRIM68 appear in nuclei, cytoplasm, or both?
Expect cytoplasmic staining, including a possible perinuclear pattern, and evaluate nuclear staining separately because both compartments are reported for TRIM68 (UniProt Q6AZZ1). Independent subcellular data support nucleoplasm and cytosol localisation, while tissue IHC describes a general cytoplasmic pattern (HPA subcellular; HPA tissue IHC). Use a nuclear counterstain and examine individual cells at high magnification to distinguish nuclear signal from cytoplasm overlying nuclei (standard IHC practice). Record compartment-specific intensity and the fraction of positive cells rather than merging both signals into one score (standard IHC practice).
How can I assess an antibody signal if its TRIM68 epitope is unspecified?
TRIM68 has 2 annotated isoforms, and its B30.2/SPRY domain spans residues 285–481 (UniProt Q6AZZ1). The supplied image caption identifies dilution and specimen type but does not map the antibody epitope, so it cannot establish which isoforms are detected (caption A11532). Request an immunogen or epitope map for the exact antibody before making an isoform-specific claim, and check whether each isoform contains that sequence (standard antibody-validation practice). Until then, describe staining as antibody-detected TRIM68 and use an independent specificity control when a biological conclusion depends on isoform identity (standard IHC practice).
How should I adapt TRIM68 localisation checks to multiplex IF?
For IF, pair TRIM68 with a marker for the expected cell population and a nuclear counterstain, then inspect cytosolic and nucleoplasmic channels separately (HPA subcellular; standard IF practice). Choose spectrally separated fluorophores and reserve a channel with low tissue autofluorescence for the weaker signal after checking unstained sections (standard IF practice). TRIM68 has no transmembrane segment and is reported in cytoplasmic and nuclear compartments, so use permeabilisation suitable for intracellular epitopes and verify nuclear access (UniProt Q6AZZ1; standard IF practice). HPA lists ICC/IF images in A-431, U-251MG and U2OS, but those observations do not specify fixation conditions for this antibody (HPA subcellular).
What should I check when TRIM68 DAB staining looks diffuse?
Compare staining with a slide lacking primary antibody to assess secondary-reagent and detection background, and inspect endogenous pigment before interpreting brown deposits (standard chromogenic IHC practice). Check peroxidase blocking, antibody concentration and wash consistency; the selected paraffin-section image used 1:100, which provides a documented comparison point for this SKU (standard IHC practice; caption A11532). TRIM68 is reported mainly in cytoplasmic and nuclear compartments, so diffuse extracellular staining warrants closer scrutiny (UniProt Q6AZZ1; standard IHC interpretation). Examine section edges and damaged areas separately, and retain morphology in view when deciding whether stronger staining is cellular (standard IHC practice).
How should I score TRIM68 staining across specimens? ⚠ ANSWER MARKED FOR VERIFICATION
Define the cell population and compartment before scoring, because TRIM68 staining may be cytoplasmic or nuclear and tissue expression varies by cell type (UniProt Q6AZZ1; HPA tissue IHC). For each compartment, report the percentage of positive eligible cells and an H-score based on intensity categories, using identical thresholds across slides (standard IHC quantification practice). Normalise counts to the number of morphologically intact eligible cells; if reporting positive-cell density, divide by analysed tissue area in mm² (standard IHC quantification practice). Keep regions with necrosis or processing artefact out of the analysed area and document that exclusion consistently (standard IHC quantification practice).
When is TRIM68 staining convincing rather than an artefact?
Convincing signal should resolve to intact cells and plausible cytoplasmic or nuclear compartments, including possible perinuclear staining (UniProt Q6AZZ1; standard IHC interpretation). Check cell identity against tissue context: HPA reports high staining in cerebral-cortex glial cells and no detected staining in spleen red-pulp cells, but rates its tissue-IHC reliability uncertain (HPA tissue IHC). Treat strong section-edge deposits, necrotic regions and pigment-like or endogenous-enzyme staining as possible artefacts until morphology and detection controls support a cellular signal (standard IHC practice). Compare matched negative controls and compartment-specific patterns before interpreting a difference as TRIM68 biology (standard IHC practice).
Boster reagents
Best TRIM68 / E3 ubiquitin-protein ligase TRIM68 IHC Antibodies
A11532 has a real IHC image from a paraffin-embedded human brain section; IF is listed as an application, and human and mouse are listed as reactive species (catalog applications, reactivity and IHC image caption).
Real IHC data
Anti-SS-56 TRIM68 Antibody
Cat # A11532
A11532 will render with an IHC image of paraffin-embedded human brain at 1:100 (A11532 IHC image caption). Its catalog lists IF and human and mouse reactivity, but provides no IF image (A11532 applications, reactivity and IF image alts).
Which to pick: Choose A11532 for paraffin-section tissue IHC because its own image caption documents human brain staining at 1:100; the fixative is unreported (A11532 IHC image caption). For IF/ICC, A11532 lists IF at 1:50, but ICC is not listed and no IF image is supplied (A11532 applications, IF dilution and IF image alts). A11532 is the cross-species candidate because the polyclonal antibody lists human and mouse reactivity; its IHC image documents human tissue only (A11532 dilution_raw, reactivity and IHC image caption).
Each figure is that product's own IHC / IF validation image from its datasheet.
References
- UniProt Consortium. UniProt entry Q6AZZ1 (TRI68_HUMAN, E3 ubiquitin-protein ligase TRIM68).
- Human Protein Atlas. TRIM68 tissue IHC expression (reliability: Uncertain).
- Human Protein Atlas. TRIM68 subcellular location (ICC-IF): Mainly localized to the nucleoplasm and cytosol..
- Human Protein Atlas. TRIM68 antibody validation summary (1 antibodies).
- TRIM68, PIKFYVE, and DYNLL2: The Possible Novel Autophagy- and Immunity-Associated Gene Biomarkers for Osteosarcoma Prognosis. Frontiers in oncology 2021 — PMC8101494.
- PubMed PMID:11560955 — UniProt-cited evidence.
- PubMed PMID:14702039 — UniProt-cited evidence.
- PubMed PMID:16554811 — UniProt-cited evidence.
Immunohistochemistry protocol sheet for TRIM68 (E3 ubiquitin-protein ligase TRIM68). Expected localisation Tissue: cytoplasmic (HPA tissue IHC); molecular: nuclear/perinuclear (UniProt). Antigen retrieval: Tris-EDTA pH 9.0 HIER, 95–98 °C, 20 min (rule: nuclear antigen). Validated IHC antibody: A11532 at 1:100 (the product's own IHC validation image is shown). Controls (HPA): positive Adrenal gland (Glandular cells); negative Spleen. IHC workflow; specimen preparation unspecified. Protocol steps: 1. Sample: Paraffin-embedded human brain tissue; fixative not specified (datasheet A11532); 2. Fixation: Image fixative and duration unreported (datasheet A11532); 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-induced epitope retrieval in Tris-EDTA buffer, pH 9.0 , 20 min at 95–98 °C…; 6. Peroxidase block: 3% H2O2, 10 min , room temperature (standard); 7. Blocking: 10% normal serum of the secondary host, 30 min , room temperature (standard); 8. Primary antibody: Rabbit anti-TRIM68, 1:100 (datasheet A11532); 9. Primary incubation: Overnight at 4 °C (standard). Watch for: Fixation: Keep fixation conditions consistent across paraffin sections (standard IHC practice; not target-specific); Caveat: Tissue staining has uncertain RNA consistency (HPA tissue IHC); Isoform / epitope: 2 isoforms; intracellular epitope coverage needs checking (UniProt); Regulation: Androgen-dependent up-regulation possible (UniProt). Evidence: UniProt Q6AZZ1, HPA tissue IHC · Uncertain, HPA ICC-IF · Mainly localized to the nucleoplasm and cytosol., Datasheet A11532, PMC8101494. QR code links to https://www.bosterbio.com/bosterbio-gene-info-cards/TRIM68/immunohistochemistry-ihc-guide.