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UBB / Polyubiquitin-B · IHC design guide
Design Immunohistochemistry for UBB
Plan chromogenic UBB IHC in paraffin sections using mainly nuclear tissue staining as the reference (HPA tissue IHC). This guide covers consistent fixation and interpretation of staining that may reflect protein from more than one gene (standard IHC practice; HPA tissue IHC).
Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use
UBB 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 | Mainly nuclear staining across tissues (HPA tissue IHC) | |
| Staining pattern | Mainly nuclear staining in cells across all tissues (HPA tissue IHC) | |
| Antigen retrieval | Citrate pH 6 HIER, heat-mediated (datasheet PB9122) | |
| Positive control | Adrenal gland+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) | |
| Caveat | Staining may reflect protein from more than one gene (HPA tissue IHC) | |
| Regulation | Low tissue specificity (HPA tissue RNA) | |
| Isoform / epitope | No annotated isoforms; processed into 3 ubiquitin units (UniProt) |
Section 1
Recommended UBB IHC & IF Protocols
The catalog antibody has an IHC-P protocol (datasheet: PB9122). The published options include one UBB prostate-tissue protocol (PMC10930646) and three mutant UBB+1 protocols (PMC3400757; PMC4362318; PMC5427096).
| Sample | Paraffin-embedded rat intestine tissue; fixative not specified (datasheet PB9122) |
| Fixation | Image fixative and duration unreported (datasheet PB9122); verify before use. |
| Sectioning | 4–5 µm sections on charged slides (standard) |
| Deparaffinisation | Xylene, graded ethanol series to water (standard) |
| Antigen retrieval | Heat retrieval: Citrate pH 6, 20 min (datasheet PB9122) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet PB9122) |
| Primary antibody | Rabbit anti-UBB, 0.5-1μg/ml (datasheet PB9122) |
| Primary incubation | Overnight at 4 °C (datasheet PB9122) |
| Detection | Streptavidin-biotin complex (SABC), DAB chromogen (datasheet PB9122) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | UBB-positive staining in glandular cells of adrenal gland (HPA tissue IHC: High). HPA tissue profile: Mainly nuclear expression in all tissues. No signal in the no-primary control. |
💡Decision noteStart with citrate pH 6 heat retrieval for the catalog antibody (datasheet: PB9122). The published UBB prostate protocol used high-pH retrieval (PMC10930646).
Section 2
What Is the Expected UBB Staining Pattern?
In paraffin-section IHC, expect mainly nuclear staining across tissues, including high staining in selected glandular, respiratory epithelial, and glial cells (HPA: tissue IHC, Supported; medium antibody–RNA consistency). Cytoplasmic signal can also be biologically plausible (UniProt P0CG47: cytoplasm and nucleus). UBB has no transmembrane segment (UniProt P0CG47: topology). Interpret either compartment cautiously because the HPA antibodies may also recognize proteins from other genes (HPA: tissue IHC caution).
| Predominantly nuclear staining in glandular cells of breast or adrenal gland. | This fits the reported tissue pattern and high staining in those cells (HPA: mainly nuclear expression; High in breast and adrenal gland glandular cells). Assess intensity against the section’s controls; staining alone cannot establish UBB-specific recognition (HPA: multiple-gene targeting caution). |
| Cytoplasmic staining accompanies nuclear staining, or appears in an IF image. | Cytoplasmic localization is plausible (UniProt P0CG47: cytoplasm). HPA tissue IHC is mainly nuclear, whereas ICC-IF is mainly cytosolic with uncertain main-location status (HPA: tissue IHC; HPA: subcellular). Interpret the result in its own assay context. |
| The dominant signal outlines cell surfaces or fills extracellular spaces. | Treat this as a localization mismatch requiring control review: the reported locations are intracellular and UBB has no transmembrane segment (UniProt P0CG47: localization and topology; HPA: tissue IHC). Check whether the pattern persists when primary antibody is omitted (general IHC practice). |
| Cardiomyocytes stain as strongly as a high-staining reference cell population. | That contrast warrants scrutiny because cardiomyocytes are reported at low staining, while several glandular and epithelial populations are high (HPA: tissue IHC). Compare compartments and controls before assigning cross-reactivity or endogenous detection activity (general IHC practice). |
| Broad, nearly uniform color obscures nuclei and cell boundaries. | The slide cannot be scored confidently for the mainly nuclear tissue pattern (HPA: tissue IHC). Background may reflect detection or blocking conditions (general IHC practice); its appearance alone does not identify a UBB-specific cause. |
💡Expected UBB appearanceA persuasive positive shows mainly nuclear staining in an HPA high-staining population such as breast glandular cells, with interpretable cell boundaries; strong extracellular color or uniform background is suspicious (HPA: tissue IHC; general IHC practice).
| What the antibody recognizes | UBB yields three ubiquitin chains after processing (UniProt P0CG47: chains 1–76, 77–152, 153–228). HPA cautions that its antibodies target proteins from multiple genes, so a positive cell cannot be assigned uniquely to UBB (HPA: tissue IHC caution). |
| Compartment and assay | Tissue IHC is mainly nuclear (HPA: tissue IHC). ICC-IF is mainly cytosolic, but that location is marked uncertain; acrosome and equatorial-segment locations are approved in the subcellular record (HPA: subcellular). These are assay-specific observations. |
| IHC antibody evidence | HPA041344, HPA049132, and CAB013048 each have Supported IHC status (HPA: antibody validation). The tissue profile has medium antibody–RNA consistency and a multiple-gene caution (HPA: tissue IHC reliability); Supported status does not remove that caveat. |
| Antigen retrieval and fixation | No target-specific retrieval condition or fixation sensitivity is supplied (UniProt P0CG47; HPA: tissue IHC). If signal is weak, review the catalog antibody’s IHC-P instructions and run a controlled retrieval comparison (general IHC practice), without predicting a UBB-specific benefit. |
| IF/ICC question: should its signal match IHC? | No exact match is established: HPA reports mainly nuclear tissue IHC and mainly cytosolic ICC-IF, with the latter marked uncertain (HPA: tissue IHC; HPA: subcellular). Use the separate IF/ICC guide for that assay. |
| Situation | Likely cause | Next action |
|---|---|---|
| No signal in an HPA high-staining reference tissue. | A failed IHC run or unsuitable detection conditions are possible (general IHC practice); the tissue expectation is high staining in the specified cells (HPA: tissue IHC). | Confirm the intended cells are present, examine the positive and omission controls, then check the catalog antibody’s IHC-P instructions for retrieval and dilution (general IHC practice). Do not infer fixation sensitivity from this result. |
| Nuclear signal is absent, but cytoplasmic signal is present. | Cytoplasm is an annotated UBB location, yet tissue IHC is mainly nuclear (UniProt P0CG47: localization; HPA: tissue IHC). A compartment difference alone cannot establish failure. | Verify cell morphology and controls, compare with the reported tissue IHC pattern, and record both compartments separately (HPA: tissue IHC; general IHC practice). |
| Extracellular or surface-rim color dominates. | This differs from the reported intracellular locations and lacks support from UBB topology (UniProt P0CG47: localization and no transmembrane segment; HPA: tissue IHC). | Inspect the primary-omission control and detection background, then reassess whether any intracellular pattern remains (general IHC practice). |
| Unexpectedly strong staining appears in cardiomyocytes. | Cardiomyocytes are listed as low, so a strong result may reflect assay background or recognition of another protein; the latter is a stated HPA antibody caveat (HPA: tissue IHC). | Compare the same run with a reported high-staining cell population and the omission control; avoid assigning the signal specifically to UBB without further validation (HPA: tissue IHC; general IHC practice). |
| Diffuse chromogen masks the expected pattern. | High background can arise from detection or blocking conditions (general IHC practice). It prevents reliable assessment of the mainly nuclear tissue pattern (HPA: tissue IHC). | Review the omission control, blocking, washing, and detection timing, then repeat with conditions that preserve visible nuclei and cell boundaries (general IHC practice). |
| An IF/ICC result appears more cytosolic than the IHC section. | The reported assay patterns differ: mainly cytosolic ICC-IF is marked uncertain, while tissue IHC is mainly nuclear (HPA: subcellular; HPA: tissue IHC). | Score the assays separately and consult the IF/ICC guide for its own interpretation; do not use the IF image to redefine the expected paraffin-section pattern (HPA: tissue IHC; HPA: subcellular). |
Experiment evidence
IHC & IF images showing UBB staining
PB9122 · IHCIHC analysis of Ubiquitin using anti-Ubiquitin antibody (PB9122). Ubiquitin was detected in paraffin-embedded section of rat intestine tissu
PB9122 · IHCIHC analysis of Ubiquitin using anti-Ubiquitin antibody (PB9122). Ubiquitin was detected in paraffin-embedded section of human mammary cance
PB9122 · IFIF analysis of Ubiquitin using anti-Ubiquitin antibody (PB9122). Ubiquitin was detected in immunocytochemical section of A431 cells. Enzyme
M02848-3 · IHCImmunohistochemical analysis of paraffin-embedded Human breast cancer, using the Antibody at 1:250 dilution.
M02848-3 · IHCImmunohistochemical analysis of paraffin-embedded Human esophageal carcinoma, using the Antibody at 1:250 dilution.
M02848-3 · IFImmunofluorescent analysis of Raji cells, using Ubiquitin Antibody .
M02848 · IHCImmunohistochemical analysis of paraffin-embedded human breast cancer, using Ubiquitin Antibody.
M02848 · IFImmunofluorescent analysis of Jurkat cells, using Ubiquitin Antibody.
PA1420 · IHCAnti-Ubiquitin antibody, PA1420, IHC(P) IHC(P): Human Lung Cancer Tissue
HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000170315-UBB/tissue/cerebral+cortex#imid_14330284
HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000170315-UBB/tissue/colon#imid_14374355
HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000170315-UBB/tissue/liver#imid_14374340
HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000170315-UBB/tissue/kidney#imid_14374341
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA041344; green = UBB, blue = nucleus, red = microtubules.
HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA041344; green = UBB, blue = nucleus, red = microtubules.
← swipe / scroll for more images →
Real IHC / IF data behind the staining-pattern expectations in this section.
Sample controls for UBB IHC & IF
🧪Run adrenal gland first; its glandular cells should stain (HPA: High in adrenal gland glandular cells). HPA detects UBB in all 45 scored tissues, so there is no supported negative tissue or validated antigen-negative cell population on the positive slide; assess unstained cells against the no-primary and isotype controls rather than treating them as UBB-negative (HPA: no negative rows).
Positive control tissue: Adrenal gland (Glandular cells, HPA High)
Negative control tissue: None in HPA: UBB 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 UBB in A-431, Sperm, with annotated localisation: Cytosol (uncertain) (HPA subcellular).
Technical controls: Include a no-primary, secondary-only slide, a host- and clonality-matched rabbit IgG control, and UBB-knockout material as a biological negative if available (caption: rabbit primary antibody; standard IHC practice). Check endogenous peroxidase and biotin background on the adrenal slide because the reported detection uses biotinylated secondary antibody, SABC and DAB (caption: PB9122 detection).
⚠️Feasibility: The selected PB9122 paraffin-section caption reports citrate retrieval at pH 6 for 20 minutes, but does not establish whether retrieval is required across specimens (caption: PB9122). Its fixative is unreported, and no target-specific fixation window or fixation effect is supplied (caption: fixative not stated). The evidence does not establish whether frozen sections or IF are easier; endogenous biotin or peroxidase can complicate chromogenic interpretation in the selected tissue (caption: biotin–SABC/DAB detection; standard IHC practice).
HPA tissue IHC evidence for UBB
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Supported — Medium consistency between antibody staining and RNA expression data. Caution, targets protein from more than one gene.). 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 → |
| Breast | Glandular cells | High | Protein (IHC) | HPA → |
| Bronchus | Respiratory epithelial cells | High | Protein (IHC) | HPA → |
| Caudate | Glial cells | High | Protein (IHC) | HPA → |
| Cerebellum | Cells in granular layer | High | Protein (IHC) | HPA → |
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| None in HPA: UBB is detected in all 45 scored tissues. Use a no-primary (secondary-only) and an isotype control instead. | ||||
Section 3
Advanced UBB IHC Tips
Troubleshoot paraffin section UBB staining by checking retrieval, compartment patterns, antibody specificity and scoring before assigning biological meaning.
How should I retrieve UBB antigen in paraffin sections?
Start with heat mediated citrate buffer at pH 6 for 20 minutes (datasheet PB9122). That condition produced chromogenic staining in a paraffin section of rat intestine using the catalog antibody at 1 μg/ml overnight at 4°C (datasheet PB9122). If staining is weak, verify heating and cooling consistency, then compare a modestly adjusted retrieval time on adjacent sections while holding antibody incubation and detection constant (standard IHC practice). Score nuclear and cytoplasmic signal separately, since UBB derived ubiquitin has both locations and overly harsh retrieval can make diffuse staining difficult to interpret (UniProt P0CG47 localisation; standard IHC practice).
Could fixation explain weak or uneven UBB staining?
The selected tissue caption reports a paraffin section but does not state its fixative, so target specific fixation sensitivity is unknown (datasheet PB9122). Record the fixative and fixation duration for each specimen, and compare similarly processed sections before attributing differences to UBB abundance (standard IHC practice). If staining varies within a section, inspect tissue preservation and compare an internal area away from damaged edges under the same retrieval and detection conditions (standard IHC practice). Do not infer a preferred fixative from nuclear staining patterns or from ubiquitin processing and modified residues; neither establishes fixation sensitivity (HPA tissue IHC; UniProt P0CG47 processing and modified residues).
Where should credible UBB staining appear within cells?
Assess nuclear and cytoplasmic compartments: UBB derived ubiquitin is annotated in the nucleus and cytoplasm, with an additional mitochondrial outer membrane annotation (UniProt P0CG47 localisation). Tissue IHC is described as mainly nuclear across tissues, while the subcellular IF summary describes mainly cytosolic staining with uncertain main location (HPA tissue IHC; HPA subcellular). Compare nuclei and surrounding cytoplasm within the same cell type and section, using the counterstain to define nuclear boundaries (standard IHC practice). A purely extracellular or tissue edge pattern warrants a processing and background check before biological interpretation (UniProt P0CG47 localisation; standard IHC practice).
Can this stain distinguish UBB from other ubiquitin sources or chain types?
Do not assign every positive cell specifically to UBB: the tissue IHC assessment cautions that its antibodies target proteins from more than one gene (HPA tissue IHC). UBB has zero annotated isoforms and encodes three ubiquitin units at residues 1–76, 77–152 and 153–228 (UniProt P0CG47 processing and isoforms). Processed ubiquitin can be free or attached to other proteins in several chain arrangements, so chromogenic intensity alone cannot identify a particular linkage or source gene (UniProt P0CG47 function). Check the antibody's documented epitope and specificity evidence before making either claim, and report the result as ubiquitin immunoreactivity when specificity is unresolved (standard IHC practice; HPA tissue IHC).
How should I plan a companion IF experiment for UBB?
For IF/ICC, multiplex the ubiquitin signal with a marker defining the cell population being evaluated, then compare signal within matched cell boundaries (standard IF practice). Select spectrally separated fluorophores and favor a longer wavelength detection channel when tissue autofluorescence obscures the ubiquitin channel; include an unstained section to assess that background (standard IF practice). Permeabilise sufficiently to access nuclear and cytoplasmic antigen, since these are annotated locations, but do not assume an epitope orientation from the mitochondrial outer membrane annotation: UBB has no transmembrane segment and the antibody epitope side is unspecified (UniProt P0CG47 localisation and topology; standard IF practice). Optimise permeabilisation using the IF antibody and specimen directly, rather than transferring the paraffin IHC conditions (standard IF practice; datasheet PB9122).
How can I reduce diffuse brown staining without losing UBB signal?
Run a no primary control through secondary antibody, detection reagent and DAB steps to locate nonspecific chromogen deposition (standard IHC practice). The selected paraffin section used 10% goat serum blocking, a biotinylated goat anti rabbit secondary and an avidin biotin detection complex, so compare background after each relevant detection step (datasheet PB9122; standard IHC practice). Apply a peroxidase block and assess endogenous biotin where the chosen detection chemistry requires it (standard IHC practice). If background persists, titrate primary concentration around the reported 1 μg/ml condition while preserving a tissue control and checking whether nuclear and cytoplasmic contrast improves (datasheet PB9122; UniProt P0CG47 localisation; standard IHC practice).
How should I score UBB staining across tissue sections? ⚠ ANSWER MARKED FOR VERIFICATION
Define the cell population and compartment before scoring, because tissue IHC is mainly nuclear while UBB derived ubiquitin is also annotated in the cytoplasm (HPA tissue IHC; UniProt P0CG47 localisation). For chromogenic sections, report the percentage of positive cells and an H score from intensity categories, or positive cell density per mm² when cell counts are the endpoint (standard IHC practice). Normalise counts to the number of eligible cells or measured viable tissue area, and keep thresholds, illumination and image analysis settings fixed across sections (standard IHC practice). Report nuclear and cytoplasmic scores separately and identify the antibody used, since the HPA tissue assessment cautions about staining proteins from multiple genes (standard IHC practice; HPA tissue IHC).
When does a UBB positive pattern justify a biological conclusion?
Treat a reproducible intracellular nuclear or cytoplasmic pattern as plausible ubiquitin immunoreactivity, consistent with annotated localisation and the mainly nuclear tissue IHC profile (UniProt P0CG47 localisation; HPA tissue IHC). Compare the candidate signal with a no primary control and an intact area of the same section; staining restricted to cut edges, necrotic regions or damaged cells warrants caution (standard IHC practice). Exclude endogenous peroxidase or detection reagent signal before calling a brown deposit positive, and check that the stained cells match the population being scored (standard IHC practice). Even credible staining cannot by itself identify UBB as the source gene, a particular ubiquitin linkage or proteasomal activity (HPA tissue IHC; UniProt P0CG47 function).
Boster reagents
Best UBB / Polyubiquitin-B IHC Antibodies
Catalog anti-UBB antibodies have IHC images from human tissue and mouse/rat intestine (catalog IHC captions), plus IF images from A431, Jurkat, and Raji cells (catalog IF captions).
Real IHC data
Anti-Ubiquitin/UBB Antibody ®
Cat # PB9122
Real IHC data
Anti-Ubiquitin UBB Rabbit Monoclonal Antibody
Cat # M02848-3
Real IHC data
Anti-Ubiquitin UBB Rabbit Monoclonal Antibody
Cat # M02848
Real IHC data
Anti-Ubiquitin/UBB Antibody ®
Cat # PA1420
PB9122 has paraffin-section IHC images from rat and mouse intestine and human mammary cancer, while PA1420 has an IHC image from human lung cancer tissue (catalog IHC captions). M02848 has a human breast cancer IHC image and Jurkat IF image; M02848-3 has human breast cancer, esophageal carcinoma, stomach, and colon IHC images and a Raji IF image (catalog image captions).
Which to pick: For tissue IHC, choose PB9122: its paraffin-section captions document citrate retrieval and DAB detection (PB9122 IHC captions); the fixative is unreported (PB9122 IHC captions). For IF/ICC, M02848 is a rabbit monoclonal with both applications listed and a Jurkat IF image (M02848 catalog entry; IF caption). For work across human, mouse, and rat tissues, PB9122 has paraffin-section IHC images from all three species (PB9122 IHC captions).
Each figure is that product's own IHC / IF validation image from its datasheet.
References
- UniProt Consortium. UniProt entry P0CG47 (UBB_HUMAN, Polyubiquitin-B).
- Human Protein Atlas. UBB tissue IHC expression (reliability: Supported).
- Human Protein Atlas. UBB subcellular location (ICC-IF): Mainly localized to the cytosol. In addition localized to the acrosome and equatorial segment. Caution: Based on antibodies targeting proteins from multiple genes..
- Human Protein Atlas. UBB antibody validation summary (3 antibodies).
- Long-term proteasomal inhibition in transgenic mice by UBB(+1) expression results in dysfunction of central respiration control reminiscent of brainstem neuropathology in Alzheimer patients. Acta neuropathologica 2012 — PMC3400757.
- Ubiquitin B, Ubiquitin C, and β-Catenin as Promising Diagnostic and Prognostic Tools in Prostate Cancer. Cancers 2024 — PMC10930646.
- Localization of mutant ubiquitin in the brain of a transgenic mouse line with proteasomal inhibition and its validation at specific sites in Alzheimer's disease. Frontiers in neuroanatomy 2015 — PMC4362318.
- Selective Transgenic Expression of Mutant Ubiquitin in Purkinje Cell Stripes in the Cerebellum. Cerebellum (London, England) 2017 — PMC5427096.
- PubMed PMID:3029682 — UniProt-cited evidence.
- PubMed PMID:14745543 — UniProt-cited evidence.
- PubMed PMID:16625196 — UniProt-cited evidence.
Immunohistochemistry protocol sheet for UBB (Polyubiquitin-B). Expected localisation Mainly nuclear staining across tissues (HPA tissue IHC). Antigen retrieval: Citrate pH 6 HIER, heat-mediated (datasheet PB9122). Validated IHC antibody: PB9122 at 0.5-1μg/ml (the product's own IHC validation image is shown). Controls (HPA): positive Adrenal gland (Glandular cells); 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 rat intestine tissue; fixative not specified (datasheet PB9122); 2. Fixation: Image fixative and duration unreported (datasheet PB9122); 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: Citrate pH 6 , 20 min (datasheet PB9122); 6. Peroxidase block: 3% H2O2, 10 min , room temperature (standard); 7. Blocking: 10% goat serum (datasheet PB9122); 8. Primary antibody: Rabbit anti-UBB, 0.5-1μg/ml (datasheet PB9122); 9. Primary incubation: Overnight at 4 °C (datasheet PB9122). Watch for: Fixation: Keep fixation consistent across sections. (standard IHC practice; not target-specific); Caveat: Staining may reflect protein from more than one gene (HPA tissue IHC); Isoform / epitope: No annotated isoforms; processed into 3 ubiquitin units (UniProt); Regulation: Low tissue specificity (HPA tissue RNA). Evidence: UniProt P0CG47, HPA tissue IHC · Supported, HPA ICC-IF · Mainly localized to the cytosol. In addition localized to the…, Datasheet PB9122, PMC3400757, PMC10930646. QR code links to https://www.bosterbio.com/bosterbio-gene-info-cards/UBB/immunohistochemistry-ihc-guide.