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- Table of Contents
Plan ATP1B1 chromogenic IHC on paraffin sections using 2–5 μg/ml as the catalog antibody’s starting range (datasheet A03469-1). Kidney collecting ducts provide a high-staining control, and membranous staining is expected in many tissues (HPA tissue IHC).
Expected localisation, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
| Expected localisation | Membranous staining in many tissues (HPA tissue IHC) | |
| Staining pattern | Membranous staining in glandular cells and collecting ducts (HPA tissue IHC) | |
| Antigen retrieval | EDTA pH 8.0 HIER, heat-mediated (datasheet A03469-1) | |
| Positive control | Duodenum+4 more · see all | |
| Negative control | Adipose tissue+4 more · see all |
| Fixation | Keep fixation consistent across paraffin 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 A03469-1) | |
| Caveat | Antibody staining and RNA show medium consistency (HPA tissue IHC) | |
| Regulation | Kidney-enhanced RNA expression (HPA tissue RNA) | |
| Isoform / epitope | 2 isoforms; check cytoplasmic versus extracellular epitope (UniProt) |
The catalog antibody has an IHC-P protocol (datasheet A03469-1). Published IHC examples include rat CA1 sections (PMC5970211) and lung cancer tissue microarrays (PMC7174014).
| Sample | Paraffin-embedded human breast cancer tissue; fixative not specified (datasheet A03469-1) |
| Fixation | Image fixative and duration unreported (datasheet A03469-1); verify before use. |
| Sectioning | 4–5 µm sections on charged slides (standard) |
| Deparaffinisation | Xylene, graded ethanol series to water (standard) |
| Antigen retrieval | Heat retrieval: EDTA pH 8.0 (datasheet A03469-1); 20 min, 95–100 °C (standard) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet A03469-1) |
| Primary antibody | Rabbit anti-ATP1B1, 2-5 μg/ml (datasheet A03469-1) |
| Primary incubation | Overnight at 4 °C (datasheet A03469-1) |
| Detection | Streptavidin-biotin complex (SABC), DAB chromogen (datasheet A03469-1) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | ATP1B1-positive staining in glandular cells of duodenum (HPA tissue IHC: High). HPA tissue profile: Membranous expression in many tissues. No signal in the no-primary control. |
ATP1B1 is a cell membrane protein with residues 1–34 cytoplasmic, 35–62 transmembrane, and 63–303 extracellular (UniProt P05026 topology). In paraffin section IHC, expect membranous staining in many tissues, especially kidney collecting ducts and glandular cells of duodenum, gallbladder, salivary gland, and small intestine (HPA tissue IHC: High). HPA rates the tissue IHC pattern Enhanced, with medium consistency between staining and RNA data (HPA tissue IHC reliability).
| Membrane outlines in kidney collecting ducts or duodenal glandular cells, with strong chromogenic signal (HPA: High in these cells). | This fits the reported cell types, intensity, and membrane pattern (HPA tissue IHC). Compare staining within the named cells; a high tissue rating does not mean every cell in that section should stain equally (HPA tissue IHC). |
| Predominantly nuclear staining, with no convincing membrane outline in an otherwise positive cell population. | A nuclear dominant pattern conflicts with ATP1B1 membrane localisation (UniProt P05026 subcellular location; HPA tissue IHC: membranous expression). Review staining controls and morphology before scoring it as specific ATP1B1 signal (general IHC practice). |
| Strong signal in adipocytes or esophageal squamous epithelial cells. | HPA reports ATP1B1 as not detected in those specific cell populations (HPA tissue IHC). Check for nonspecific antibody binding or endogenous detection activity (general IHC practice); the HPA result does not label every cell in those tissues negative. |
| Uniform brown haze across cells, stroma, and empty areas, without cell membrane definition. | This distribution obscures the reported membranous pattern (HPA tissue IHC). Assess background with a negative reagent control and review blocking, washing, and chromogen development (general IHC practice). |
| No staining in kidney collecting ducts, despite visible, intact ducts and an otherwise interpretable section. | This misses a reported High population (HPA tissue IHC: kidney collecting ducts). First confirm assay controls and tissue identity; absent staining alone cannot distinguish technical failure from sample variation (general IHC practice). |
| Membrane topology and epitope location | ATP1B1 has one membrane span and a large extracellular region at residues 63–303 (UniProt P05026 topology). The payload does not identify the catalog antibody epitope, so topology alone cannot set retrieval or permeabilisation conditions. |
| Tissue and cell selection | Kidney collecting ducts and the listed high expressing glandular populations offer observed positive patterns (HPA tissue IHC: High). HPA also reports medium neuropil staining in cerebral cortex and no detection in selected glial populations; score the annotated cell type, not the tissue name (HPA tissue IHC). |
| Evidence strength | HPA describes membranous expression in many tissues and rates its tissue IHC reliability Enhanced, while noting medium agreement with RNA (HPA tissue IHC). One listed antibody, HPA012911, has IHC Enhanced status (HPA antibodies); these summaries do not prove specificity in every specimen. |
| Isoforms and modification | UniProt lists 2 isoforms and glycosylation sites at residues 158, 193, and 265 (UniProt P05026). Their effect on this antibody's staining is unreported; do not infer an isoform specific or glycosylation dependent pattern from these annotations. |
| IF/ICC Q&A: What localisation should an IF result support? | A membrane pattern is consistent with UniProt and the HPA subcellular summary (UniProt P05026; HPA ICC-IF: Membrane). HPA supplies no ICC-IF image cell lines or main location here, and the listed antibody has no ICC validation status (HPA ICC-IF; HPA antibodies). |
| Situation | Likely cause | Next action |
|---|---|---|
| Kidney collecting ducts show no chromogenic signal (HPA tissue IHC: High). | The run may have failed, or the section may lack assessable collecting ducts (general IHC practice). | Confirm duct identity and section quality; inspect assay controls, then review retrieval, antibody incubation, and detection steps (general IHC practice). No ATP1B1 specific retrieval condition is established by these sources. |
| The entire section is brown, including areas without recognisable cells. | Background from the staining workflow can conceal membrane outlines (general IHC practice). | Compare a negative reagent control, check blocking and wash steps, and shorten excessive chromogen development if indicated (general IHC practice). Reassess whether cell membranes remain distinguishable (HPA tissue IHC: membranous expression). |
| Nuclei dominate the signal in a reported positive population. | This conflicts with ATP1B1's reported cell membrane localisation (UniProt P05026; HPA tissue IHC). | Check counterstain and chromogen appearance, examine a negative reagent control, and score only a reproducible membrane pattern in the expected cells (general IHC practice; HPA tissue IHC). |
| Adipocytes or esophageal squamous epithelial cells stain strongly. | Those populations are reported as not detected (HPA tissue IHC); nonspecific staining or endogenous detection activity is possible (general IHC practice). | Verify cell identity, inspect negative controls, and review blocking and detection chemistry before interpreting the signal as ATP1B1 (general IHC practice). |
| A whole organ is called negative because one cell population lacks staining. | HPA observations apply to named cells: for example, liver cholangiocytes are not detected, while kidney collecting ducts are High (HPA tissue IHC). | Record tissue compartment and cell type alongside intensity; compare like cell populations before classifying a result (HPA tissue IHC; general IHC practice). |
| An IF/ICC image is treated as validation for the paraffin section result. | The supplied HPA subcellular entry has no ICC-IF image cell lines, and HPA012911 has no listed ICC status (HPA ICC-IF; HPA antibodies). | Judge the paraffin section against the HPA tissue IHC membrane pattern and cell specific observations; keep IF/ICC interpretation within its own guide (HPA tissue IHC; HPA ICC-IF). |
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Enhanced — 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.
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Duodenum | Glandular cells | High | Protein (IHC) | HPA → |
| Gallbladder | Glandular cells | High | Protein (IHC) | HPA → |
| Kidney | Collecting ducts | High | Protein (IHC) | HPA → |
| Salivary gland | Glandular cells | High | Protein (IHC) | HPA → |
| Small intestine | Glandular cells | High | Protein (IHC) | HPA → |
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adipose tissue | Adipocytes | Not detected | Protein (IHC) | HPA → |
| Caudate | Glial cells | Not detected | Protein (IHC) | HPA → |
| Cerebellum | Cells in granular layer | Not detected | Protein (IHC) | HPA → |
| Cervix | Glandular cells | Not detected | Protein (IHC) | HPA → |
| Esophagus | Squamous epithelial cells | Not detected | Protein (IHC) | HPA → |
Troubleshoot ATP1B1 chromogenic IHC by checking retrieval, membrane localisation, staining controls and cell specific scoring.
A03469-1 has illustrated IHC in human paraffin sections and IF in SiHa cells and mouse and rat kidney sections (catalog image captions).
A03469-1 is the SKU with a rendered card and its own IHC figure, showing staining in a human breast cancer paraffin section (card caption). Its catalog images also show IHC in human colonic adenocarcinoma, gall bladder adenosquamous carcinoma and liver cancer sections, plus IF in SiHa cells and mouse and rat kidney sections (catalog image captions).
Which to pick: Choose A03469-1 for tissue IHC: its own figure uses a human paraffin section, EDTA retrieval at pH 8.0 and 2 μg/ml primary antibody; the fixative is unreported (card caption). Choose A03469-1 for IF/ICC or illustrated cross-species work: its catalog images show IF in SiHa cells and mouse and rat kidney sections, while its application list includes IHC, IF and ICC with human, mouse and rat reactivity (catalog image captions; catalog applications and reactivity). M03469 is a rabbit monoclonal listed for IHC in those three species, but it has no supplied IHC image caption to establish sample processing (catalog: clone 23A21, applications and reactivity; catalog image alts).