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UBB / Polyubiquitin-B · IHC design guide
Design Immunohistochemistry for UBB
Plan chromogenic UBB IHC on paraffin sections with 0.5–1 µg/mL catalog antibody (datasheet PB9122). Expect mainly nuclear tissue staining, and account for antibody detection of protein from more than one gene (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 in tissues (HPA tissue IHC) | |
| Staining pattern | Mainly nuclear staining across 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 | Signal may include ubiquitin from other genes (HPA tissue IHC) | |
| Regulation | Expression regulation not annotated (UniProt) | |
| Isoform / epitope | No isoforms; three ubiquitin units are processed (UniProt) |
Section 1
Recommended UBB IHC & IF Protocols
The catalog antibody has a citrate pH 6 IHC-P protocol (datasheet: PB9122). The published protocols below include native UBB staining and mutant UBB+1 staining (PMC10930646; 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 prostate study used high-pH retrieval with a different anti-UBB antibody (PMC10930646).
Section 2
What Is the Expected UBB Staining Pattern?
UBB-related IHC staining is mainly nuclear across tissues (HPA tissue IHC: Supported; medium consistency with RNA). Cytoplasmic staining is also biologically plausible (UniProt P0CG47: cytoplasm and nucleus). Expect strong staining in documented glandular, respiratory epithelial, glial, and cerebellar granular-layer cells (HPA tissue IHC: High). Interpret staining as ubiquitin-related rather than uniquely UBB-derived: the HPA profile cautions that its antibodies target proteins from more than one gene (HPA tissue IHC).
| Predominantly nuclear staining in breast glandular cells or bronchial respiratory epithelial cells. | This matches the reported tissue pattern; both cell populations are High (HPA tissue IHC). Cytoplasmic signal can coexist with nuclear signal (UniProt P0CG47 localization). |
| A dominant, continuous cell-surface rim with little nuclear staining. | Treat this as an atypical pattern requiring controls: HPA reports mainly nuclear tissue staining, while UniProt lists nucleus, cytoplasm, and mitochondrion outer membrane (HPA tissue IHC; UniProt P0CG47). |
| Strong staining in a cell population outside the documented examples. | Do not call it false solely because that population is unlisted: HPA reports low tissue specificity and cautions about multi-gene recognition (HPA tissue IHC). Check cellular detail and antibody controls (general IHC practice). |
| Diffuse color over tissue spaces, edges, and cells alike. | The distribution does not reproduce HPA's mainly nuclear cellular pattern (HPA tissue IHC). Check background and detection controls before assigning it to UBB-related staining (general IHC practice). |
| No cellular signal in bronchial respiratory epithelium or adrenal glandular cells. | Both are reported High (HPA tissue IHC). A blank result there calls for review of the IHC workflow and positive control before interpreting other sections as negative (general IHC practice). |
💡Expected UBB appearanceA convincing positive is mainly nuclear staining in documented High cell populations, such as bronchial respiratory epithelium, with cytoplasmic signal possible; diffuse noncellular color is suspect (HPA tissue IHC; UniProt P0CG47 localization; general IHC practice).
| IHC versus IF/ICC: should the compartments match? | HPA tissue IHC is mainly nuclear, whereas HPA ICC-IF reports mainly cytosol (uncertain) plus acrosome and equatorial segment (approved). Compare each result with its own assay evidence; the ICC-IF page supplies the IF workflow (HPA tissue IHC; HPA subcellular). |
| Attribution to UBB | The tissue profile cautions that antibodies target proteins from more than one gene; HPA041344, HPA049132, and CAB013048 have Supported IHC status (HPA tissue IHC; HPA antibodies). A positive stain alone cannot assign signal uniquely to UBB. |
| Precursor processing | The 229-residue precursor contains three ubiquitin units at residues 1–76, 77–152, and 153–228 (UniProt P0CG47 processing). The recognized species depends on the antibody epitope; its location is not supplied. |
| Cell-type intensity comparison | HPA reports High staining in listed glandular, respiratory epithelial, glial, and granular-layer cells, but Low in heart cardiomyocytes (HPA tissue IHC). The Low result is a comparison point, not a negative control. |
| Antigen retrieval | Retrieval conditions can be checked against the catalog antibody's IHC-P instructions as a general paraffin-IHC step (general IHC practice). Neither HPA nor UniProt establishes UBB-specific fixation sensitivity or an optimal retrieval condition. |
| Situation | Likely cause | Next action |
|---|---|---|
| Known High tissue is blank. | The result conflicts with reported High bronchial respiratory epithelial staining (HPA tissue IHC); the failed step is undetermined. | Review the positive control, catalog antibody's IHC-P instructions, retrieval, and detection reagents (general IHC practice). |
| Cytoplasm dominates and nuclei are consistently blank in tissue sections. | This departs from mainly nuclear tissue IHC, although cytoplasmic localization is recorded (HPA tissue IHC; UniProt P0CG47). | Check nuclear morphology and compare a documented High cell population on the same run (HPA tissue IHC; general IHC practice). |
| Nearly every cell and tissue space is uniformly colored. | Noncellular color is inconsistent with the mainly nuclear tissue pattern (HPA tissue IHC); background may contribute (general IHC practice). | Inspect a no-primary control and review blocking, washes, and chromogen development (general IHC practice). |
| Chromogenic signal persists without primary antibody. | The control indicates detection background; endogenous enzyme activity is one possible cause in chromogenic IHC (general IHC practice). | Review the detection control and use the appropriate endogenous-activity block for the chosen detection system (general IHC practice). |
| An unexpected cell population stains strongly. | HPA warns of recognition of proteins from multiple genes; low tissue specificity also limits cell-type exclusion (HPA tissue IHC). | Compare morphology and a documented High population, then assess specificity with an independent antibody where available (HPA tissue IHC; general IHC practice). |
| Heart cardiomyocytes stain as strongly as the chosen High control. | HPA reports Low cardiomyocyte staining, but slide processing and antibody specificity may also influence the comparison (HPA tissue IHC; general IHC practice). | Compare matched sections at the same development time and review background and antibody controls before scoring intensity (general IHC practice). |
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 breast first: its glandular cells should stain (HPA: High in breast glandular cells). HPA lists no negative tissue because UBB is detected in all 45 scored tissues (HPA: no negative rows; detected in all 45); use no-primary and isotype controls for the negative comparison, and do not designate any cell type on the positive slide as an internal negative.
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 and a host- and clonality-matched isotype control; for PB9122, match the rabbit host (PB9122 tissue-IHC caption: rabbit primary antibody). Add a validated immunizing-peptide competition control if the peptide is available, and block endogenous peroxidase and biotin when using the caption’s biotin-based SABC/DAB detection (PB9122 tissue-IHC caption: biotinylated secondary, SABC and DAB).
⚠️Feasibility: A target-specific fixation window or fixation effect is unreported, and the selected PB9122 paraffin-section caption does not state a fixative (PB9122 tissue-IHC caption: fixative unreported). The documented starting retrieval is citrate buffer at pH 6 for 20 minutes; its necessity has not been established by the supplied evidence (PB9122 tissue-IHC caption). The evidence does not establish that frozen sections or IF are easier; assess them separately, including breast-section background from endogenous peroxidase or biotin when using SABC/DAB (PB9122 tissue-IHC caption: SABC/DAB detection).
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
Use the catalog antibody’s tissue staining conditions as a starting point, then interpret UBB staining with its broad localisation and shared ubiquitin epitopes in mind.
Which antigen retrieval should I start with for paraffin section IHC?
Start with heat mediated retrieval in citrate buffer at pH 6 for 20 minutes (datasheet PB9122). Keep section thickness, heating method and cooling consistent while comparing runs (standard IHC practice). The selected rat intestine image used this retrieval before overnight incubation with 1 μg/ml primary antibody at 4°C (caption PB9122). If staining is weak, optimise heating and primary antibody concentration on adjacent sections before testing another retrieval buffer (standard IHC practice). Include a no primary control, because stronger retrieval can also increase nonspecific chromogenic signal (standard IHC practice).
How should I troubleshoot variable staining after fixation?
The selected paraffin section caption does not state a fixative, so target specific fixation sensitivity is unknown (caption PB9122). Record fixative, fixation duration and processing history for every specimen, then compare sections processed together (standard IHC practice). Start the staining comparison with citrate retrieval at pH 6 for 20 minutes, as documented for the catalog antibody (datasheet PB9122). If staining differs between batches, run a previously stained reference section alongside them and review morphology and retrieval consistency (standard IHC practice). Do not attribute a weak result to a particular fixation effect without a controlled comparison (standard IHC practice).
Should I expect nuclear or cytoplasmic UBB staining in tissue sections?
Expect a predominantly nuclear tissue pattern as a comparison point, while assessing cytoplasmic staining separately (HPA tissue IHC: mainly nuclear expression in all tissues; UniProt P0CG47: nucleus and cytoplasm). UniProt also lists the mitochondrial outer membrane and reports no transmembrane segment (UniProt P0CG47 localisation and topology). The HPA subcellular IF summary instead describes mainly cytosolic localisation with uncertainty and cautions that its antibodies target proteins from multiple genes (HPA subcellular). Compare staining within intact cells at the same magnification and record nuclear and cytoplasmic intensity separately (standard IHC practice). A compartment alone cannot establish UBB specificity (HPA tissue IHC: targets protein from more than one gene).
Can this stain distinguish UBB from other ubiquitin sources or processed products?
Do not interpret positive chromogenic staining as uniquely identifying UBB: the HPA tissue assessment cautions that antibodies target proteins from more than one gene (HPA tissue IHC). UBB has 0 annotated isoforms and is processed into 3 ubiquitin chains spanning residues 1–76, 77–152 and 153–228 (UniProt P0CG47 processing and isoforms). Ubiquitin can occur free or covalently attached to other proteins, so staining does not distinguish those states without an appropriately validated epitope specific reagent (UniProt P0CG47 function; standard IHC interpretation). Its recorded modifications include phosphorylation and ADP ribosylation, but no antibody epitope is supplied here (UniProt P0CG47 modified residues; supplied antibody evidence). Use an independent specificity control before assigning a signal to one molecular form (standard IHC practice).
How should I assess UBB by IF alongside this IHC result?
Treat IF/ICC as a separate assay: the selected antibody caption documents paraffin section chromogenic IHC, with no IF/ICC staining conditions (caption PB9122). Multiplex a cell type marker appropriate to the tissue, such as a glandular cell marker when examining the listed glandular compartments, and check each channel alone (HPA tissue IHC: glandular cell staining; standard IF practice). Choose a fluorophore outside the strongest measured tissue autofluorescence and include an unstained section for comparison (standard IF practice). If testing a cytosolic or nuclear epitope, optimise permeabilisation while checking cellular morphology; the antibody epitope and its membrane facing side are unspecified (UniProt P0CG47 localisation and topology; supplied antibody evidence). Compare compartment patterns cautiously because HPA subcellular localisation is flagged as uncertain and based on antibodies targeting multiple genes (HPA subcellular).
What should I check when DAB staining looks widespread or patchy?
First compare a no primary section with the stained section to identify signal from detection reagents or tissue itself (standard IHC practice). The selected workflow used 10% goat serum blocking, a biotinylated secondary, a streptavidin biotin complex and DAB (caption PB9122). For that workflow, assess endogenous biotin and apply an endogenous peroxidase block as needed; these are general chromogenic IHC controls (standard IHC practice). Check whether brown signal follows section edges, folds, damaged areas or incomplete reagent coverage rather than intact cell compartments (standard IHC practice). Recheck blocking, washing and primary concentration against the documented 1 μg/ml starting condition before interpreting diffuse signal as ubiquitin staining (caption PB9122; standard IHC practice).
How can I score UBB staining across tissue samples? ⚠ ANSWER MARKED FOR VERIFICATION
Define the cell population and compartment before scoring, and keep retrieval, detection and image settings consistent across samples (standard IHC practice). For nuclear staining, report the percentage of positive intact cells and an H score from 0–300, calculated from percentages at intensity grades 0–3 (standard IHC scoring practice). Score cytoplasmic staining separately because both nucleus and cytoplasm are annotated locations (UniProt P0CG47 localisation). Normalise positive cell counts or stained area to the number of eligible cells or analysed tissue area, and exclude folds and necrosis (standard IHC practice). Label the result as ubiquitin immunoreactivity unless antibody specificity for UBB has been independently established (HPA tissue IHC: targets protein from more than one gene).
How do I separate plausible UBB staining from artefact?
Look for reproducible staining in intact cells with a plausible nuclear or cytoplasmic pattern, while recognising that mitochondrial outer membrane localisation is also annotated (HPA tissue IHC: mainly nuclear; UniProt P0CG47 localisation). High staining in listed glandular and neural cell populations can support a tissue level comparison, but no listed population is a UBB specific positive control (HPA tissue IHC: positive cell populations and cross gene caution). Treat isolated edge staining, necrotic deposits and signal in no primary sections as possible artefacts (standard IHC practice). Check endogenous peroxidase and biotin contributions when using the documented biotin based DAB workflow (caption PB9122; standard IHC practice). Do not infer a particular ubiquitin linkage or degradation pathway from chromogenic intensity alone (UniProt P0CG47 function; standard IHC interpretation).
Boster reagents
Best UBB / Polyubiquitin-B IHC Antibodies
Catalog anti-UBB antibodies have IHC images from human, mouse, and rat paraffin sections and IF images from A431, Jurkat, and Raji cells (catalog image 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 IHC images of rat and mouse intestine and human mammary cancer in paraffin sections; PA1420 has an IHC image of human lung cancer tissue (respective IHC captions). M02848 has a human breast cancer IHC image and a Jurkat IF image; M02848-3 has human breast cancer, esophageal carcinoma, stomach, and colon IHC images and a Raji IF image (respective image captions).
Which to pick: For tissue IHC, PB9122 offers the clearest processing example: its rat intestine paraffin-section caption specifies citrate retrieval at pH 6 for 20 minutes, goat-serum blocking, and DAB detection; the fixative is unreported (PB9122 IHC caption). For IF/ICC, PB9122 has an A431 cell IF example, while the rabbit monoclonals M02848 and M02848-3 list IF/ICC and show Jurkat and Raji cell IF images, respectively (PB9122 IF caption; M02848 and M02848-3 catalog applications and IF captions). For cross-species IHC, PB9122 has paraffin-section examples from human, mouse, and rat; all four SKUs list reactivity with those three species, but their other IHC captions do not establish a fixative (PB9122 IHC captions; catalog reactivity; PA1420, M02848, and M02848-3 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 in 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: Signal may include ubiquitin from other genes (HPA tissue IHC); Isoform / epitope: No isoforms; three ubiquitin units are processed (UniProt); Regulation: Expression regulation not annotated (UniProt). 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.