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BAMBI / BMP and activin membrane-bound inhibitor homolog · IHC design guide
Design Immunohistochemistry for BAMBI
Plan BAMBI IHC-P around cytoplasmic staining observed across several tissues (HPA tissue IHC) and its annotated membrane topology (UniProt). Lung macrophages show medium staining (HPA tissue IHC), but staining and RNA expression show low consistency (HPA tissue IHC).
Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use
BAMBI 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 | Cytoplasmic staining observed; membrane location annotated (HPA tissue IHC; UniProt) | |
| Staining pattern | Cytoplasmic staining across several tissue types (HPA tissue IHC) | |
| Antigen retrieval | Citrate pH 6.0 HIER, 95–98 °C, 20 min (rule: cytoplasmic / membrane antigen) | |
| Positive control | Adipose tissue+4 more · see all | |
| Negative control | Cervix+4 more · see all |
Important caveats
Reasons your staining may differ from the expected pattern.
| Fixation | Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image A07983) | |
| Caveat | Staining and RNA expression show low consistency (HPA tissue IHC) | |
| Regulation | Expression regulation is not annotated (UniProt) | |
| Isoform / epitope | No isoforms annotated; epitope side affects interpretation (UniProt) |
Section 1
Recommended BAMBI IHC & IF Protocols
Compare the catalog antibody’s IHC-P protocol (datasheet) with four published BAMBI IHC protocols (PMC11504530; PMC5097819; PMC12194233; PMC2890648).
| Sample | Tissue sections; selected-image fixative not specified (standard IHC workflow) |
| Fixation | Image fixative and duration unreported (datasheet A07983); 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 citrate buffer, pH 6.0, 20 min at 95–98 °C (standard rule: cytoplasmic / membrane 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-BAMBI, 5 μg/mL (datasheet A07983) |
| 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 | BAMBI-positive staining in adipocytes of adipose tissue (HPA tissue IHC: Medium). HPA tissue profile: Cytoplasmic expression in several different tissue types. No signal in the no-primary control. |
💡Decision noteStart with citrate pH 6.0 HIER at 95–98 °C for 20 min (page retrieval rule); the liver TMA protocol used Tris-EDTA pH 9 (PMC11504530).
Section 2
What Is the Expected BAMBI Staining Pattern?
BAMBI is a transmembrane protein with an extracellular region at residues 21–152 and a cytoplasmic region at 174–260 (UniProt Q13145 topology). In tissue IHC, expect cytoplasmic staining in selected cells, including lung macrophages and bronchial respiratory epithelial cells (HPA tissue IHC: Medium). HPA rates its tissue staining Approved, while reporting low consistency with RNA data and pending external verification (HPA tissue IHC reliability).
| Selective, moderate cytoplasmic staining in lung macrophages or bronchial respiratory epithelial cells (HPA tissue IHC: Medium). | This matches the reported tissue IHC pattern (HPA tissue IHC: cytoplasmic expression). Assess the named cell population, since a positive area does not imply that every cell should stain. The membrane topology (UniProt Q13145) does not require a crisp membrane rim in chromogenic sections. |
| Predominantly nuclear staining, with little cytoplasmic signal, in a tissue section. | This differs from the reported tissue IHC profile (HPA tissue IHC: cytoplasmic expression). Check morphology and controls before calling it BAMBI. Approved nucleolar fibrillar center localisation comes from ICC-IF (HPA subcellular), so it cannot by itself validate nuclear chromogen in IHC. |
| Prominent staining in colon glandular cells or esophageal squamous epithelial cells (HPA tissue IHC: Not detected). | That conflicts with the reported cell-specific observations and raises possible cross-reactivity or endogenous detection activity (HPA tissue IHC). It is a reason to investigate, not proof of an artefact: the HPA IHC reliability note reports low consistency with RNA data and pending external verification. |
| Diffuse color across unrelated cells or tissue spaces, with poor cell boundaries. | A widespread haze does not resemble the selective cytoplasmic pattern (HPA tissue IHC). Consider nonspecific detection or background from the chromogenic workflow (general IHC practice). A no-primary control helps distinguish detection background from antibody-dependent staining. |
| No staining in lung macrophages or bronchial respiratory epithelial cells (HPA tissue IHC: Medium). | First check that the expected cells are present and identifiable. Review the IHC-validated antibody and detection controls, then repeat with appropriate assay controls if needed (general IHC practice). An HPA Medium observation is a useful comparison, not a guarantee for every specimen. |
💡Expected BAMBI appearanceCall a positive result when identifiable lung macrophages or bronchial respiratory epithelial cells show selective, approximately Medium cytoplasmic chromogen (HPA tissue IHC); diffuse haze or strong staining in HPA Not detected cell populations warrants investigation (HPA tissue IHC).
| Compartment and epitope orientation | BAMBI has extracellular residues 21–152, a transmembrane segment at 153–173, and cytoplasmic residues 174–260 (UniProt Q13145 topology). Antibody epitope location is not supplied, so topology alone cannot predict the staining outline or a retrieval requirement. |
| Protein processing | UniProt lists a signal peptide at residues 1–20 and the mature chain at 21–260 (UniProt Q13145 processing). No propeptide or shedding event is annotated in the supplied record; do not use either to explain unexpected tissue staining. |
| Glycosylation | One glycosylation site is listed at residue 87 (UniProt Q13145 glycosylation). The supplied sources do not show that it changes recognition by the IHC-validated antibody, so use it as structural context rather than a cause of weak or absent staining. |
| Tissue and antibody evidence | Several named populations show Medium staining, while others are Not detected (HPA tissue IHC). The tissue IHC profile is Approved but has low RNA consistency and awaits external verification (HPA tissue IHC reliability). HPA010866 is IHC Approved; that status does not establish every new antibody or specimen as equivalent (HPA antibodies). |
| IF/ICC question: should puncta or nucleoli be expected in IHC? | HPA reports mainly vesicles, plus nucleoli fibrillar center and lipid droplets, in ICC-IF (HPA subcellular: approved locations). Those observations can guide review of an IF image, but the reported tissue IHC pattern is cytoplasmic (HPA tissue IHC); they do not establish an IHC puncta requirement. |
| Situation | Likely cause | Next action |
|---|---|---|
| The presumed positive section is blank. | The named HPA-positive cell population may be absent, or an assay step may have failed; neither conclusion follows from a blank slide alone (HPA tissue IHC: Medium in selected cells). | Locate the relevant cells on the counterstained section. Check a suitable positive assay control and the IHC-validated antibody's specified conditions, including retrieval and dilution if provided (general IHC practice). |
| Color covers most of the section. | Broad staining is unlike HPA's cytoplasmic signal in selected tissue populations (HPA tissue IHC); nonspecific antibody or detection background is possible (general IHC practice). | Compare a no-primary control and inspect whether color follows cell outlines. Review blocking, wash steps, antibody concentration, and chromogen development using the assay instructions (general IHC practice). |
| Strong signal appears in colon glandular cells. | HPA reports these cells as Not detected, so cross-reactivity or endogenous detection activity is possible; that comparison does not prove either cause (HPA tissue IHC: colon). | Check a no-primary control and compare cell morphology and the expected positive population. Seek independent antibody or orthogonal evidence before assigning that staining to BAMBI (general IHC practice). |
| Staining is mainly nuclear in tissue IHC. | Predominantly nuclear chromogen departs from the reported cytoplasmic tissue pattern (HPA tissue IHC). An ICC-IF nucleolar location does not establish this section's antibody specificity (HPA subcellular). | Check localisation against the counterstain and assay controls. Record the discrepancy and avoid scoring nuclear color as confirmed BAMBI solely from the ICC-IF finding. |
| A sharp membrane rim is absent despite cytoplasmic color. | Membrane topology (UniProt Q13145) and the cytoplasmic tissue IHC profile (HPA tissue IHC) describe different kinds of evidence; antibody epitope location is unavailable. | Judge the result against the reported cell-specific cytoplasmic pattern and controls. Do not reject an otherwise plausible IHC signal solely because it lacks a continuous membrane outline. |
| An IF image shows vesicular puncta while the IHC section looks broadly cytoplasmic. | The methods have separate observations: vesicles are the approved main ICC-IF location (HPA subcellular), and tissue IHC is described as cytoplasmic (HPA tissue IHC). | Interpret each image against its own reported pattern and controls. Do not require an ICC-IF vesicle pattern in chromogenic IHC or use the IF image alone to validate an IHC result. |
Experiment evidence
IHC & IF images showing BAMBI staining
A07983 · IHCImmunohistochemistry of BAMBI in human lung tissue with BAMBI antibody at 5 μg/ml.
A07983 · IFImmunofluorescence of BAMBI in human lung tissue with BAMBI antibody at 20 μg/ml.
HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000095739-BAMBI/tissue/cerebral+cortex#imid_7510728
HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000095739-BAMBI/tissue/colon#imid_7510662
HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000095739-BAMBI/tissue/liver#imid_7510655
HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000095739-BAMBI/tissue/kidney#imid_7510664
HPA · ICC-IF MCF-7Human Protein Atlas immunofluorescence, MCF-7, antibody HPA010819; green = BAMBI, blue = nucleus, red = microtubules.
HPA · ICC-IF MCF-7Human Protein Atlas immunofluorescence, MCF-7, antibody HPA010819; green = BAMBI, blue = nucleus, red = microtubules.
← swipe / scroll for more images →
Real IHC / IF data behind the staining-pattern expectations in this section.
Sample controls for BAMBI IHC & IF
🧪Run fallopian tube first: glandular cells should stain (HPA: Medium in fallopian tube glandular cells). Use cervix glandular cells as the negative tissue (HPA: Not detected in cervix glandular cells); on the positive slide, adjacent nonglandular cells should lack comparable specific staining before they are treated as internal negatives.
Positive control tissue: Adipose tissue (Adipocytes, HPA Medium)
Negative control tissue: Cervix (HPA Not detected)
ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show BAMBI in MCF-7, SK-MEL-30, U2OS, with annotated localisation: Vesicles (approved) (HPA subcellular).
Technical controls: Include a no-primary (secondary-only) control, a host- and class-matched isotype control for a monoclonal primary or matched normal host IgG for a polyclonal primary, and a BAMBI knockout control or peptide block if the immunizing peptide is available (standard IHC practice). Check for endogenous peroxidase signal in blood-containing areas of the fallopian tube section before interpreting chromogenic staining (standard IHC practice).
⚠️Feasibility: A BAMBI-specific fixation window and antigen-retrieval dependency are unreported in the supplied evidence; the selected A07983 lung IHC caption gives 5 μg/ml but does not report a fixative (selected-SKU tissue-IHC caption). Whether frozen sections or IF are easier is also unreported; HPA provides ICC-IF images in MCF-7, SK-MEL-30 and U2OS, but these do not establish performance in tissue sections (HPA: subcellular). No tissue-specific artefact is documented here; distinguish any luminal debris from cellular chromogenic staining when scoring fallopian tube glands (standard IHC practice).
HPA tissue IHC evidence for BAMBI
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Approved — Low consistency between antibody staining and RNA expression data. Pending external verification.). Rows are taken directly from the HPA tissue chart — click any row's HPA link to view the source.
Positive expression · recommended positive controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adipose tissue | Adipocytes | Medium | Protein (IHC) | HPA → |
| Bone marrow | Hematopoietic cells | Medium | Protein (IHC) | HPA → |
| Bronchus | Respiratory epithelial cells | Medium | Protein (IHC) | HPA → |
| Cerebral cortex | Neuropil | Medium | Protein (IHC) | HPA → |
| Fallopian tube | Glandular cells | Medium | Protein (IHC) | HPA → |
Undetected expression · recommended negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Cervix | Glandular cells | Not detected | Protein (IHC) | HPA → |
| Colon | Glandular cells | Not detected | Protein (IHC) | HPA → |
| Duodenum | Glandular cells | Not detected | Protein (IHC) | HPA → |
| Esophagus | Squamous epithelial cells | Not detected | Protein (IHC) | HPA → |
| Oral mucosa | Squamous epithelial cells | Not detected | Protein (IHC) | HPA → |
Section 3
Advanced BAMBI IHC Tips
Troubleshoot BAMBI staining in paraffin section IHC by checking retrieval, cell identity, and compartment before comparing staining intensity across specimens.
How should I retrieve BAMBI in paraffin sections when staining is weak?
Use citrate pH 6.0 HIER at 95–98 °C for 20 min for BAMBI paraffin IHC (page retrieval rule). Keep section thickness, heating, and cooling consistent across the run so differences in staining are easier to interpret. BAMBI has an extracellular region at residues 21–152 and a cytoplasmic region at 174–260, so accessibility can depend on the antibody epitope (UniProt Q13145 topology). If signal remains weak, first check antibody concentration, reagent activity, and the positive control before changing retrieval conditions. Record any retrieval change alongside the control result, because stronger chromogen alone does not establish specific BAMBI staining.
How can I assess whether fixation is causing weak BAMBI IHC staining?
BAMBI-specific fixation sensitivity is unknown from the supplied evidence; the selected lung IHC caption does not state its fixative (A07983 tissue-IHC caption). For paraffin sections, compare specimens with documented fixation histories and include a control section processed alongside each batch. Assess morphology and staining together: uneven preservation or a sharp difference between the tissue edge and center can point to processing variation (standard IHC practice). Keep fixation, processing, retrieval, and development conditions as consistent as possible before changing antibody concentration. Do not infer a BAMBI-specific fixation effect from tissue expression patterns or from the protein’s membrane topology.
Should BAMBI staining appear at the membrane or in the cytoplasm?
BAMBI is annotated as a membrane protein with a transmembrane segment at residues 153–173 (UniProt Q13145 topology). Tissue IHC shows cytoplasmic expression across several tissue types (HPA tissue IHC), while cell imaging places it mainly in vesicles and additionally in nucleoli fibrillar centers and lipid droplets (HPA subcellular). Score membrane-associated and cytoplasmic staining separately rather than forcing all positive cells into one compartment. Compare each pattern with cell morphology, an appropriate control, and the antibody’s documented epitope if available. Treat isolated nuclear staining cautiously because the reported nucleolar observation comes from cell imaging, not this catalog antibody’s tissue IHC (HPA subcellular; A07983 tissue-IHC caption).
How does BAMBI epitope location affect interpretation of tissue IHC?
No BAMBI isoforms are annotated in the supplied record, so an apparent staining difference should not automatically be assigned to an isoform (UniProt Q13145 record). The mature chain spans residues 21–260; residues 21–152 are extracellular and 174–260 are cytoplasmic (UniProt Q13145 processing and topology). A glycosylation site is annotated at residue 87 (UniProt Q13145 glycosylation). Check the catalog antibody’s immunogen or mapped epitope before interpreting loss of staining in one compartment. If the epitope is undisclosed, compare staining against cell type and control sections, and describe the observed pattern without assigning a molecular cause.
How can IF help resolve ambiguous BAMBI staining in an IHC study?
Use IF as a follow-up to the paraffin IHC finding, with a marker for the cell type being evaluated; lung macrophages are a reasonable comparison population because they show medium tissue IHC staining (HPA: lung macrophages, Medium). Choose spectrally separated fluorophores and favor a red or far-red BAMBI channel when tissue autofluorescence interferes with shorter wavelengths (standard IF practice). Set permeabilisation according to the antibody epitope: a cytoplasmic epitope requires access across the plasma membrane, whereas an extracellular epitope may be assessed without that step (UniProt Q13145 topology; standard IF practice). Include single-stain and no-primary controls. HPA cell imaging reports mainly vesicular localisation, but that observation does not validate this catalog antibody for IF (HPA subcellular).
What should I check when BAMBI chromogenic IHC has diffuse background?
Inspect a no-primary control to distinguish detection-system staining from antibody-dependent signal, and use a matched negative control when available (standard IHC practice). In peroxidase-based IHC, check the endogenous peroxidase block before DAB development; persistent color in the no-primary control warrants attention to the detection steps (standard IHC practice). Reduce nonspecific signal by checking blocking, antibody concentration, washing, and chromogen development time one variable at a time. The selected BAMBI lung image used 5 µg/ml, but that caption alone does not establish an optimal concentration for every paraffin specimen (A07983 tissue-IHC caption). Compare suspected background with cell morphology and the same run’s controls before scoring it as BAMBI.
How should I quantify BAMBI staining across paraffin tissue sections? ⚠ ANSWER MARKED FOR VERIFICATION
Define the cell population and compartment before scoring; lung macrophages have medium staining in the tissue reference, while BAMBI tissue IHC is described as cytoplasmic across several tissues (HPA tissue IHC). For a defined cell population, report the percentage of positive cells and an H-score using consistent intensity categories (standard IHC practice). For spatially dispersed cells, report positive-cell density per mm² of viable tissue, with the counting region documented (standard IHC practice). Normalize counts to the relevant cell population or viable tissue area, rather than the whole image when those denominators differ. Keep retrieval, exposure to chromogen, counterstain, and scoring thresholds consistent across specimens.
How can I distinguish true BAMBI staining from artefact?
Start with cell identity and compartment: the tissue reference reports medium staining in lung macrophages and cytoplasmic staining across several tissues (HPA tissue IHC). A membrane-associated pattern can also be considered in light of BAMBI’s transmembrane topology, but compartment alone cannot establish specificity (UniProt Q13145 topology). Check whether signal tracks tissue edges, necrotic areas, pigment, or the no-primary control before calling cells positive (standard IHC practice). In peroxidase-based detection, residual endogenous enzyme activity can resemble DAB signal, so verify the peroxidase block when the control stains (standard IHC practice). Interpret discordant tissue staining cautiously because the HPA tissue IHC profile has low consistency with RNA expression and awaits external verification (HPA tissue IHC reliability).
Boster reagents
Best BAMBI / BMP and activin membrane-bound inhibitor homolog IHC Antibodies
A07983 has IHC and IF images from human lung tissue (catalog: image captions), with listed reactivity to human, mouse and rat (catalog: reactivity).
Real IHC data
Anti-BAMBI Antibody
Cat # A07983
A07983 is listed for IHC-P and IF, with an IHC image of human lung tissue at 5 μg/mL (catalog: applications; IHC image caption). Its IF image also shows human lung tissue at 20 μg/mL (catalog: IF image caption).
Which to pick: For tissue IHC, choose A07983 because IHC-P is listed and its IHC image shows human lung tissue; the caption does not report section processing or fixative (catalog: applications; IHC image caption). For IF, choose A07983 based on its human lung IF image; ICC is not listed as an application (catalog: IF image caption; applications). For work across species, A07983 lists human, mouse and rat reactivity, but the supplied IHC and IF images show human tissue only; it is rabbit hosted, with no clone reported (catalog: reactivity; image captions; host; clone).
Each figure is that product's own IHC / IF validation image from its datasheet.
References
- UniProt Consortium. UniProt entry Q13145 (BAMBI_HUMAN, BMP and activin membrane-bound inhibitor homolog).
- Human Protein Atlas. BAMBI tissue IHC expression (reliability: Approved).
- Human Protein Atlas. BAMBI subcellular location (ICC-IF): Mainly localized to vesicles. In addition localized to the nucleoli fibrillar center and lipid droplets..
- Human Protein Atlas. BAMBI antibody validation summary (2 antibodies).
- Hepatic Bone Morphogenetic Protein and Activin Membrane-Bound Inhibitor Levels Decline in Hepatitis C but Are Not Associated with Progression of Hepatocellular Carcinoma. Biomedicines 2024 — PMC11504530.
- Expression of BMP and Actin Membrane Bound Inhibitor Is Increased during Terminal Differentiation of MSCs. Stem cells international 2016 — PMC5097819.
- Comparison of Differentially Expressed Genes in Human and Canine Osteosarcoma. Life (Basel, Switzerland) 2025 — PMC12194233.
- The TGF-beta-pseudoreceptor BAMBI is strongly expressed in COPD lungs and regulated by nontypeable Haemophilus influenzae. Respiratory research 2010 — PMC2890648.
- PubMed PMID:8621228 — UniProt-cited evidence.
- PubMed PMID:15164054 — UniProt-cited evidence.
- PubMed PMID:15489334 — UniProt-cited evidence.
Immunohistochemistry protocol sheet for BAMBI (BMP and activin membrane-bound inhibitor homolog). Expected localisation Cytoplasmic staining observed; membrane location annotated (HPA tissue IHC; UniProt). Antigen retrieval: Citrate pH 6.0 HIER, 95–98 °C, 20 min (rule: cytoplasmic / membrane antigen). Validated IHC antibody: A07983 at 5 μg/mL (the product's own IHC validation image is shown). Controls (HPA): positive Adipose tissue (Adipocytes); negative Cervix. IHC workflow; specimen preparation unspecified. Protocol steps: 1. Sample: Tissue sections; selected-image fixative not specified (standard IHC workflow); 2. Fixation: Image fixative and duration unreported (datasheet A07983); 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 citrate buffer, pH 6.0 , 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-BAMBI, 5 μg/mL (datasheet A07983); 9. Primary incubation: Overnight at 4 °C (standard). Watch for: Fixation: Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image A07983); Caveat: Staining and RNA expression show low consistency (HPA tissue IHC); Isoform / epitope: No isoforms annotated; epitope side affects interpretation (UniProt); Regulation: Expression regulation is not annotated (UniProt). Evidence: UniProt Q13145, HPA tissue IHC · Approved, HPA ICC-IF · Mainly localized to vesicles. In addition localized to the nucleoli…, Datasheet A07983, PMC11504530, PMC5097819. QR code links to https://www.bosterbio.com/bosterbio-gene-info-cards/BAMBI/immunohistochemistry-ihc-guide.