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- Table of Contents
Plan ADCY6 paraffin IHC around the cytoplasmic staining observed in most tissues (HPA tissue IHC). This guide covers fixation consistency and interpretation of an antibody directed at ADCY5/6 (datasheet: A05655-1).
Expected localisation, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
| Expected localisation | Cytoplasmic in most tissues (HPA tissue IHC) | |
| Staining pattern | Cytoplasmic signal; medium in glandular cells (HPA tissue IHC) | |
| Antigen retrieval | Citrate pH 6.0 HIER, 95–98 °C, 20 min (rule: cytoplasmic / membrane antigen) | |
| Positive control | Adrenal gland+4 more · see all | |
| Negative control | Adipose tissue+2 more · see all |
| Fixation | Keep fixation consistent across sections (standard IHC practice; not target-specific); Matched tissue-IHC evidence does not establish the fixation claim. Validate the specimen-specific method before use. (selected-SKU IHC image A05655-1) | |
| Caveat | ADCY5/6-directed antibody may also detect ADCY5 (datasheet: A05655-1) | |
| Regulation | Expression regulation is unreported (UniProt) | |
| Isoform / epitope | 2 isoforms; epitope differences unknown; membrane face matters (UniProt) |
The catalog antibody’s IHC-P protocol is paired with one published ADCY6 IHC protocol for breast cancer samples (PMC9377375).
| Sample | Paraffin-embedded human brain tissue; fixative not specified (datasheet A05655-1) |
| Fixation | Image fixative and duration unreported (datasheet A05655-1); 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-ADCY6, 1:100-1:300 (datasheet A05655-1) |
| 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 | ADCY6-positive staining in glandular cells of adrenal gland (HPA tissue IHC: Medium). HPA tissue profile: Cytoplasmic expression in most tissues. No signal in the no-primary control. |
ADCY6 is a 12-pass membrane protein associated with the cell membrane, cilia and stereocilia (UniProt O43306 topology and subcellular location). In tissue IHC, HPA reports cytoplasmic staining in most tissues, including medium staining in colon glandular cells and bronchial respiratory epithelial cells (HPA tissue IHC). Its IHC reliability is Approved, with low consistency between antibody staining and RNA expression (HPA tissue IHC reliability).
| Cytoplasmic staining in colon glandular cells or bronchial respiratory epithelial cells. | This resembles HPA's reported medium staining in those cells (HPA tissue IHC). Assess the cell type alongside the signal: the tissue result provides a useful comparison, while HPA reports low consistency between antibody staining and RNA expression (HPA tissue IHC reliability). |
| A cell-edge or projection-associated signal accompanies cytoplasmic staining. | A membrane-associated component is biologically plausible because ADCY6 has 12 transmembrane segments and is assigned to the cell membrane, cilia and stereocilia (UniProt O43306 topology and subcellular location). HPA's tissue IHC summary nevertheless describes the observed pattern as cytoplasmic (HPA tissue IHC). |
| Strong nuclear staining dominates otherwise plausible positive cells. | Nuclear localisation is absent from the supplied UniProt and HPA locations (UniProt O43306 subcellular location; HPA tissue IHC and ICC-IF). Treat a nuclear-only result as suspect and compare it with a no-primary control before assigning it to ADCY6 (standard IHC practice). |
| The strongest signal occurs in adipocytes or oral squamous epithelial cells. | HPA reports ADCY6 as not detected in those respective cell types (HPA tissue IHC). Consider antibody cross-reactivity or endogenous chromogenic activity, and check controls; a discordant field alone cannot identify its cause (standard IHC practice; HPA tissue IHC reliability). |
| Broad, nearly uniform colour obscures cell boundaries and tissue structure. | This is difficult to score against HPA's cell-specific observations (HPA tissue IHC). A no-primary control can reveal detection-system background; uneven washing or excessive detection development can also obscure localisation (standard IHC practice). |
| Topology and compartment | ADCY6 spans the membrane 12 times, with annotated cytoplasmic and extracellular regions (UniProt O43306 topology). The location of this antibody's epitope is not supplied, so topology cannot predict which staining conditions will expose it. |
| Tissue-pattern confidence | The catalog antibody is IHC Approved, while HPA reports low agreement between antibody staining and RNA expression (HPA antibody CAB018365; HPA tissue IHC reliability). Use the listed cells and levels as comparisons, not as guaranteed results for every section. |
| Antigen retrieval | For paraffin IHC, follow the IHC-validated antibody's documented retrieval conditions when available, then compare positive tissue and controls (standard IHC practice). The supplied UniProt and HPA records do not establish an ADCY6-specific retrieval requirement or fixation sensitivity. |
| Chromogenic detection | Endogenous activity and nonspecific detection can produce colour without a matching primary-antibody signal; no-primary and detection controls help identify this contribution (standard IHC practice). The HPA tissue images alone do not establish its source in a new specimen. |
| IF/ICC Q: Should the IHC cytoplasmic pattern also appear in IF? | A: HPA's ICC-IF summary assigns ADCY6 to the Golgi apparatus, whereas its tissue IHC summary says cytoplasmic expression in most tissues (HPA ICC-IF; HPA tissue IHC). Interpret each application against its own observations; CAB018365 is IHC Approved and ICC Uncertain (HPA antibody CAB018365). |
| Isoform interpretation | UniProt lists 2 ADCY6 isoforms (UniProt O43306 isoforms). No antibody epitope or isoform-specific staining evidence is supplied, so an unusual tissue pattern cannot be assigned to an isoform from these records. |
| Situation | Likely cause | Next action |
|---|---|---|
| No signal in colon glandular cells or bronchial respiratory epithelial cells. | Those cells have medium HPA tissue IHC staining, but a new section may fail for a technical reason or differ from the reference (HPA tissue IHC; standard IHC practice). | Confirm the expected cell type is present; check the documented antibody dilution, retrieval and detection steps, then compare a positive control in the same run (standard IHC practice). |
| Signal appears only in nuclei. | This conflicts with the supplied membrane and cytoplasmic locations and with HPA's tissue IHC pattern (UniProt O43306 subcellular location; HPA tissue IHC). | Review the no-primary control and nuclear counterstain, and assess whether cytoplasmic cell-associated signal remains when background is excluded (standard IHC practice). |
| Adipocytes or oral squamous cells stain more strongly than expected positive cells. | HPA reports these cell types as not detected; cross-reactivity or detection background is possible, but the slide alone cannot distinguish them (HPA tissue IHC; standard IHC practice). | Compare adjacent expected-positive cells and a no-primary control, then reassess antibody and detection conditions before calling the unexpected signal ADCY6 (standard IHC practice). |
| Diffuse colour masks gland boundaries or individual cells. | Nonspecific detection, insufficient washing or overdevelopment may obscure a localised chromogenic result (standard IHC practice). | Check no-primary and detection controls; review blocking, washes and development time, and score only where cell boundaries remain interpretable (standard IHC practice). |
| An IF/ICC image looks Golgi-associated while tissue IHC looks broadly cytoplasmic. | Those are the respective HPA summaries; the catalog antibody has ICC Uncertain status, so the two views have different validation context (HPA ICC-IF; HPA tissue IHC; HPA antibody CAB018365). | Assess the tissue slide against the HPA tissue IHC reference. Treat the IF/ICC image as application-specific context, rather than requiring an identical chromogenic pattern (HPA tissue IHC; HPA ICC-IF). |
| Different paraffin sections give inconsistent intensity. | HPA rates tissue IHC Approved but notes low consistency with RNA expression; the supplied sources do not identify an ADCY6-specific fixation effect (HPA tissue IHC reliability). | Compare matched cell types and same-run controls; record retrieval, antibody dilution and detection conditions before interpreting intensity differences biologically (standard IHC practice). |
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Approved — Low 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.
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adrenal gland | Glandular cells | Medium | Protein (IHC) | HPA → |
| Appendix | Glandular cells | Medium | Protein (IHC) | HPA → |
| Bone marrow | Hematopoietic cells | Medium | Protein (IHC) | HPA → |
| Bronchus | Respiratory epithelial cells | Medium | Protein (IHC) | HPA → |
| Cerebral cortex | Endothelial cells | Medium | Protein (IHC) | HPA → |
Troubleshoot ADCY6 staining in paraffin section chromogenic IHC, with one entry on adapting the assay to IF/ICC.
The catalog lists one IHC/IF antibody, A05655-1, with images from paraffin-embedded human brain tissue and HeLa cells; its listed reactivity covers human, mouse and rat (catalog applications, image captions and reactivity).
A05655-1 has an IHC image from paraffin-embedded human brain tissue with a peptide-blocked comparison (catalog IHC image caption). The same SKU has an IF image from HeLa cells with a peptide-blocked comparison; human, mouse and rat are listed as reactive species (catalog IF image caption and reactivity).
Which to pick: For tissue IHC, choose A05655-1 on the strength of its paraffin-embedded human brain image; the caption does not report the fixative (catalog IHC image caption). For IF/ICC, A05655-1 has an IF image from HeLa cells, while ICC validation is unreported (catalog IF image caption and applications). For mouse or rat work, A05655-1 is a rabbit polyclonal with IHC and IF listed and both species in its reactivity list; the supplied images show human samples only (catalog host, dilution record, applications, reactivity and image captions).