This website uses cookies to ensure you get the best experience on our website.
- Table of Contents
Plan paraffin-section RANGAP1 IHC with the catalog antibody at 2–5 μg/ml (datasheet A02771-2). Assess nuclear, nuclear membrane and cytoplasmic staining against the tissue IHC profile (HPA tissue IHC).
Expected localisation, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
| Expected localisation | Nuclei, nuclear membrane and cytoplasm (HPA tissue IHC) | |
| Staining pattern | All cells: nuclear, nuclear membrane and cytoplasmic staining (HPA tissue IHC) | |
| Antigen retrieval | EDTA pH 8.0 HIER, heat-mediated (datasheet A02771-2) | |
| Positive control | Adrenal gland+4 more · see all | |
| Negative control | None in HPA (detected in all 45 tissues); use no-primary + isotype controls |
| Fixation | Keep fixation consistent across paraffin sections. (standard IHC practice; not target-specific) | |
| Caveat | SUMO-dependent nuclear pore targeting may alter the pattern (UniProt) | |
| Regulation | Testis-enhanced RNA expression (HPA tissue RNA) | |
| Isoform / epitope | No annotated isoforms; mature chain spans residues 2–587 (UniProt) |
The catalog antibody’s IHC-P protocol is paired with published RANGAP1 IHC protocols for lymphoma, spinal cord, and brain sections (PMC3819250; PMC5427168; PMC5595097).
| Sample | Paraffin-embedded human colorectal cancer tissue; fixative not specified (datasheet A02771-2) |
| Fixation | Image fixative and duration unreported (datasheet A02771-2); 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 A02771-2); 20 min, 95–100 °C (standard) |
| Peroxidase block | 3% H2O2, 10 min, room temperature (standard) |
| Blocking | 10% goat serum (datasheet A02771-2) |
| Primary antibody | Rabbit anti-RANGAP1, 2-5 μg/ml (datasheet A02771-2) |
| Primary incubation | Overnight at 4 °C (datasheet A02771-2) |
| Detection | HRP-conjugated secondary, DAB chromogen (datasheet A02771-2) |
| Counterstain | Hematoxylin, blue, dehydrate and mount (standard) |
| Expected result | RANGAP1-positive staining in glandular cells of adrenal gland (HPA tissue IHC: High). HPA tissue profile: Distinct expression in the nuclei, nuclear membrane and cytoplasm in all cells. No signal in the no-primary control. |
RANGAP1 staining should be visible in nuclei, at the nuclear membrane and in cytoplasm across many cell types (HPA tissue IHC: Supported). Nuclear envelope enrichment during interphase and spindle or kinetochore association during mitosis are consistent with its annotated localisation (UniProt P46060). RANGAP1 has no transmembrane segment, so a nuclear rim should be read as nuclear envelope localisation rather than a membrane spanning pattern (UniProt P46060 topology).
| Nuclear membrane, nuclear and cytoplasmic staining is visible across cells, with strong signal in selected populations. | This fits the supported tissue IHC profile of distinct staining in these compartments across cells (HPA tissue IHC: Supported). High staining is reported in Purkinje cells, cortical neurons, bone marrow hematopoietic cells and several glandular or squamous epithelial populations (HPA tissue IHC: High). Compare intensity within the named cell population; a whole tissue label does not make every structure equally strong. |
| Signal appears only in an implausible compartment, while the expected nuclear rim and cellular staining are absent. | Check the control before assigning that pattern to RANGAP1: interphase nuclear envelope and cytoplasmic localisation are annotated (UniProt P46060), and tissue IHC includes nuclear, nuclear membrane and cytoplasmic staining (HPA tissue IHC: Supported). An isolated extracellular deposit is suspicious for an IHC artefact (general IHC interpretation); localisation alone cannot identify its cause. Assess mitotic cells separately because spindle and kinetochore association can occur (UniProt P46060). |
| The darkest deposits occur in an unexpected cell population or over tissue structures without cells. | First identify the cells on the counterstained section. HPA describes staining across cells, so an unfamiliar positive cell type is not automatically cross-reactivity (HPA tissue IHC: Supported). Conversely, deposits that disregard cell boundaries warrant checks for nonspecific antibody binding or endogenous detection activity (general chromogenic IHC practice). Compare the pattern with a known-positive cell population and the detection control before calling it target signal. |
| Diffuse colour covers nuclei, cytoplasm and surrounding tissue with little cellular contrast. | That appearance cannot establish the expected localisation, even when some genuine RANGAP1 is present (HPA tissue IHC: Supported; general IHC interpretation). Inspect a reagent control for chromogen generated without primary antibody, then review blocking, antibody concentration and wash conditions as general IHC variables. The supplied HPA and UniProt records do not identify a RANGAP1-specific source of diffuse background. |
| A named high-staining population has no detectable signal. | For example, Purkinje cells or bone marrow hematopoietic cells are reported as High (HPA tissue IHC: High). Verify that the relevant cells are present and that the detection run worked before interpreting absence as biological loss (general IHC practice). HPA reports low staining in adipocytes, so adipose tissue alone is a weak choice for judging whether a run can detect RANGAP1 (HPA tissue IHC: Low in adipocytes). |
| Cell-cycle stage (UniProt P46060) | During interphase, RANGAP1 is cytoplasmic and detectable at the nuclear envelope; after nuclear envelope breakdown it associates with kinetochores until late anaphase and with the mitotic spindle, but is essentially absent from spindle poles (UniProt P46060). Interpret a mitotic figure in that context before treating its departure from an interphase nuclear rim as aberrant. |
| SUMO-dependent localisation (UniProt P46060) | Sumoylation targets RANGAP1 to nuclear pores and is required for its annotated mitotic localisation (UniProt P46060). This supports a nuclear-envelope pattern but does not show that a particular stain can resolve individual pores or measure SUMO modification. The supplied sources give no target-specific antigen-retrieval or fixation-sensitivity result. |
| Tissue and cell selection (HPA tissue IHC) | HPA reports High staining in specified cell populations, including cerebellar Purkinje cells, cerebral cortical neurons and bone marrow hematopoietic cells, while adipocytes are Low (HPA tissue IHC). Its overall tissue IHC reliability is Supported, with high consistency between staining and RNA expression (HPA tissue IHC). These labels guide control selection; they are not an intensity threshold for every cell. |
| Antibody evidence (HPA antibodies) | HPA050110 and CAB004293 have Supported IHC entries; HPA062034 has no supplied IHC status (HPA antibodies). For an IHC-P result, use the IHC-supported evidence as the relevant comparison. A Supported status describes the listed antibody validation; it does not establish the performance of every antibody or detection system. |
| IF/ICC Q&A: What should a fluorescence cross-check show? | A mainly nuclear-membrane pattern is reported, with additional cytosol, vesicle and flagellar-centriole localisation (HPA subcellular ICC-IF). Those observations can help interpret compartment identity, but ICC-IF is a separate application and its additional locations are not required features of a chromogenic tissue section (HPA subcellular ICC-IF; HPA tissue IHC). |
| Situation | Likely cause | Next action |
|---|---|---|
| No signal in a control expected to stain strongly. | The control may lack the named cells, or a general IHC preparation or detection step may have failed (HPA tissue IHC: High; general IHC practice). | Confirm the cell population on the counterstain, verify the detection control, then review antigen retrieval and antibody dilution against the validated IHC-P instructions (general IHC practice). No RANGAP1-specific retrieval condition is supplied. |
| Only a broad nuclear signal is visible; the nuclear rim cannot be judged. | Dense colour or section detail may obscure compartment boundaries (general chromogenic IHC interpretation). Nucleoplasmic localisation is also annotated (UniProt P46060). | Inspect a well-preserved, less crowded field and compare nuclear edges with cytoplasm and counterstain (general IHC practice). Do not label nuclear staining alone a false positive; seek the fuller HPA tissue pattern where resolution permits (HPA tissue IHC: Supported). |
| Colour is widespread, including spaces between cells. | Nonspecific staining or endogenous detection activity can produce background in chromogenic IHC (general IHC practice). | Examine a no-primary detection control and review blocking, washes and antibody concentration using the validated IHC-P instructions (general IHC practice). Interpret RANGAP1 only where signal follows identifiable cells and plausible compartments (HPA tissue IHC: Supported). |
| A few mitotic cells differ sharply from neighbouring interphase cells. | RANGAP1 changes location during mitosis, including kinetochore and spindle association (UniProt P46060). | Identify mitotic figures on morphology and score them apart from interphase cells (general IHC interpretation). Do not demand an intact nuclear rim after nuclear envelope breakdown or spindle-pole staining as a positive criterion (UniProt P46060). |
| An unexpected cell population stains more strongly than the selected control population. | The observation may reflect cell identity, biological variation or nonspecific detection; HPA's broad cell staining profile alone cannot distinguish these (HPA tissue IHC: Supported; general IHC interpretation). | Recheck cell identity and localisation, compare a named High population on the same run, and examine the detection control (HPA tissue IHC: High; general IHC practice). Treat unexplained intensity differences as provisional. |
| An adipose-rich section appears almost negative. | Adipocytes are listed as Low, so a faint result there is compatible with the supplied tissue profile (HPA tissue IHC: Low in adipocytes). | Judge run sensitivity with a named High population, such as bone marrow hematopoietic cells or cerebellar Purkinje cells, and confirm those cells are actually present (HPA tissue IHC: High; general IHC practice). |
Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Supported — High 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 | High | Protein (IHC) | HPA → |
| Bone marrow | Hematopoietic cells | High | Protein (IHC) | HPA → |
| Cerebellum | Purkinje cells | High | Protein (IHC) | HPA → |
| Cerebral cortex | Neuronal cells | High | Protein (IHC) | HPA → |
| Cervix | Glandular cells | High | Protein (IHC) | HPA → |
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| None in HPA: RANGAP1 is detected in all 45 scored tissues. Use a no-primary (secondary-only) and an isotype control instead. | ||||
Troubleshoot RANGAP1 staining in paraffin-section IHC by checking retrieval, compartment-specific signal, controls, and scoring before interpreting intensity.
A02771-2 has IHC data from human colorectal cancer paraffin sections and IF data from A431 cells (catalog image captions); both listed antibodies react with human, mouse and rat (catalog reactivity).
A02771-2 will render with its human colorectal cancer paraffin-section IHC image; its IF caption shows A431 cells (catalog image captions). M02771-1 will render as IHC- and IF/ICC-listed, with human, mouse and rat reactivity, but no IHC or IF image in the payload (catalog applications, reactivity and image fields).
Which to pick: Choose A02771-2 for paraffin-section IHC: its own caption documents EDTA pH 8.0 retrieval and 2 μg/ml primary antibody in human colorectal cancer tissue; the fixative is unreported (A02771-2 IHC caption). For IF/ICC, A02771-2 has an A431-cell IF image at 5 μg/ml, while M02771-1 is a rabbit monoclonal, clone 19R47, listed for IF/ICC without an image (A02771-2 IF caption; M02771-1 catalog). Both list human, mouse and rat reactivity, but the supplied tissue IHC image documents human tissue only (catalog reactivity; A02771-2 IHC caption).