GANAB / Neutral alpha-glucosidase AB · IHC design guide

Design Immunohistochemistry for GANAB

Plan chromogenic GANAB IHC in paraffin sections using placental trophoblasts as a high-staining reference (HPA tissue IHC). Assess cytoplasmic staining while accounting for cell types with no detectable signal (HPA tissue IHC).

Evidence assembled Oct 2026 · For research use; verify linked source records and product datasheet before use

Immunohistochemistry protocol sheet for GANAB (IHC for GANAB): expected localisation Cytoplasmic tissue staining (HPA tissue IHC); ER/Golgi protein localization (UniProt), antibody A09668-2, validated IHC image, and IHC protocol steps — Printable **GANAB** IHC protocol sheet — expected localisation Cytoplasmic tissue staining (HPA tissue IHC); ER/Golgi protein localization (UniProt), antibody A09668-2, controls and protocol steps. Open the full GANAB IHC guide →

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GANAB 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 tissue staining (HPA tissue IHC); ER/Golgi protein localization (UniProt)
	Staining pattern	Broad cytoplasmic staining; high in placental trophoblasts (HPA tissue IHC)
	Antigen retrieval	EDTA pH 8.0 HIER, heat-mediated (datasheet A09668-2)
	Positive control ⓘ	Appendix+4 more · see all
	Negative control ⓘ	Adipose tissue+4 more · see all

Important caveats

Reasons your staining may differ from the expected pattern.

	Fixation	Keep fixation consistent across paraffin sections. (standard IHC practice; not target-specific)
	Caveat	Some cell types lack signal despite the broad tissue profile (HPA tissue IHC)
	Regulation	No condition-dependent regulation specified (UniProt)
	Isoform / epitope	3 isoforms; epitope differences are unreported (UniProt)

Section 1

Recommended GANAB IHC & IF Protocols

The catalog antibody uses EDTA pH 8.0 heat retrieval (datasheet A09668-2). The published IHC protocols below cover colorectal cancer, urothelial carcinoma, and mouse and human paraffin sections (PMC13526586; PMC9316353; PMC10535707).

Recommended immunohistochemistry (IHC-P) protocol parameters
Sample	Paraffin-embedded human placenta tissue; fixative not specified (datasheet A09668-2)
Fixation	Image fixative and duration unreported (datasheet A09668-2); 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 A09668-2); 20 min, 95–100 °C (standard)
Peroxidase block	3% H2O2, 10 min, room temperature (standard)
Blocking	10% goat serum (datasheet A09668-2)
Primary antibody	Rabbit anti-GANAB, 2-5 μg/ml (datasheet A09668-2)
Primary incubation	Overnight at 4 °C (datasheet A09668-2)
Detection	HRP-conjugated secondary, DAB chromogen (datasheet A09668-2)
Counterstain	Hematoxylin, blue, dehydrate and mount (standard)
Expected result	GANAB-positive staining in glandular cells of appendix (HPA tissue IHC: High). HPA tissue profile: Ubiquitous cytoplasmic expression. No signal in the no-primary control.

💡Decision noteStart with EDTA pH 8.0 heat retrieval for the catalog antibody (datasheet A09668-2); the published protocols used pH 8.0 retrieval solution or citrate, respectively (PMC9316353; PMC10535707).

Section 2

What Is the Expected GANAB Staining Pattern?

GANAB is an endoplasmic reticulum protein also annotated in the Golgi apparatus; it has no transmembrane segment (UniProt Q14697 subcellular location and topology). In paraffin-section IHC, expect cytoplasmic staining across many cell types, with high staining reported in appendix glandular cells, placental trophoblastic cells and cerebral cortex neurons (HPA tissue IHC). HPA calls the tissue profile ubiquitous cytoplasmic expression, with Enhanced reliability but medium consistency between staining and RNA data (HPA tissue IHC).

What am I looking at on my slide?
Cytoplasmic staining in appendix glandular cells or placental trophoblastic cells (HPA: High in each).	This matches observed positive cell populations (HPA tissue IHC). An endoplasmic reticulum–associated distribution is plausible (UniProt Q14697; HPA subcellular ICC-IF), but chromogenic IHC may not resolve organelle boundaries (general IHC practice).
Predominantly nuclear or sharply cell-surface-only signal, without convincing cytoplasmic staining.	Recheck specificity: GANAB is annotated in the endoplasmic reticulum and Golgi apparatus and lacks a transmembrane segment (UniProt Q14697). A nuclear-only or surface-only pattern is unsupported by the supplied localization evidence; compare with a positive tissue and a negative reagent control (general IHC practice).
Strong signal in adipocytes or cardiomyocytes while nearby structures vary in staining.	Those specific cells were not detected by HPA tissue IHC (HPA: adipocytes and cardiomyocytes, Not detected). Consider cross-reactivity or endogenous detection activity before calling them GANAB-positive (general IHC practice); a negative call for these cells does not describe every cell in either tissue.
Uniform chromogen across cells, stroma and section edges, obscuring cellular boundaries.	The result cannot establish the reported cytoplasmic cell pattern (HPA tissue IHC). Check nonspecific reagent binding, endogenous enzyme activity and detection conditions with appropriate controls (general IHC practice); background intensity alone does not identify its cause.
No detectable cytoplasmic signal in appendix glandular cells or placental trophoblastic cells.	This conflicts with HPA's High observations for those cell populations (HPA tissue IHC), but one negative section does not prove absence of GANAB. Review tissue identity, antibody handling, retrieval and detection controls (general IHC practice), then repeat before interpreting a biological loss.

💡Expected GANAB appearanceCall a positive result when appropriate cells show discernible cytoplasmic chromogen, including High staining in appendix glandular cells or placental trophoblastic cells (HPA tissue IHC); isolated nuclear, surface-only or cell-independent signal is suspect given the annotated intracellular locations (UniProt Q14697; HPA subcellular ICC-IF).

How each factor affects the staining
Compartment and topology (UniProt Q14697; HPA subcellular ICC-IF).	UniProt annotates endoplasmic reticulum and Golgi localization with no transmembrane segment; HPA supports endoplasmic reticulum localization by ICC-IF. Use these findings to assess plausibility, while scoring paraffin IHC at cellular rather than organelle resolution (general IHC practice).
Cell-specific tissue pattern (HPA tissue IHC).	High staining is reported in several glandular, neuronal, lymphoid and trophoblastic populations, whereas adipocytes, cardiomyocytes and skeletal myocytes are Not detected (HPA tissue IHC). Select and interpret control cells by their stated identity, not by the tissue name alone.
Antibody evidence (HPA antibodies; HPA tissue IHC).	HPA026874 and HPA061426 each have Enhanced IHC validation (HPA antibodies). The overall tissue profile has medium staining-to-RNA consistency (HPA tissue IHC), so agreement with a listed cell pattern supports interpretation without making every unexpected positive specific.
Molecular forms (UniProt Q14697).	UniProt lists three isoforms, a cleaved signal sequence at residues 1–28, a mature chain at 29–944 and glycosylation at residue 97. An antibody's epitope would determine which forms it recognizes; the supplied evidence does not identify that epitope or establish an antigen-retrieval response.

Why is my staining missing, weak or wrong?
Situation	Likely cause	Next action
Known-positive glandular or trophoblastic cells are blank (HPA tissue IHC).	The section, staining run or reagent may have failed (general IHC practice); this observation alone cannot distinguish technical failure from reduced expression.	Confirm cell identity and run controls; review the catalog antibody's IHC-P instructions, retrieval conditions and detection reagents before repeating (general IHC practice).
Signal appears mainly nuclear or at the outer cell border.	That distribution conflicts with the supported intracellular localization (UniProt Q14697; HPA subcellular ICC-IF), raising concern about staining specificity.	Compare cellular distribution in an HPA High population and inspect negative reagent controls; avoid scoring isolated nuclear or surface signal as a confirmed positive (general IHC practice).
Adipocytes or cardiomyocytes stain strongly.	HPA reports GANAB as Not detected in those cells (HPA tissue IHC); cross-reactivity or endogenous detection activity is possible (general IHC practice).	Inspect morphology and controls, including a primary-antibody omission control; confirm any unexpected cellular positive with an independently validated reagent when available (general IHC practice).
Brown precipitate or haze masks the cytoplasm.	Diffuse background can arise from nonspecific binding, endogenous enzyme activity or detection conditions (general IHC practice); its appearance does not establish which mechanism applies.	Check the primary-antibody omission control, blocking and detection controls, then adjust the staining workflow according to the reagent instructions (general IHC practice).
Two stained sections differ in which cells look positive.	The HPA profile is broadly cytoplasmic but reports distinct levels by cell type and only medium staining-to-RNA consistency (HPA tissue IHC). Section composition can also differ (general IHC practice).	Compare matched cell populations and staining controls, then record cell type, compartment and intensity separately; do not score a whole tissue from one positive structure (general IHC practice).
IF/ICC question: Should a cytoplasmic IHC result match an organelle pattern?	HPA ICC-IF supports endoplasmic reticulum localization (HPA subcellular ICC-IF), while HPA tissue IHC describes a cytoplasmic profile (HPA tissue IHC). The methods show different levels of spatial detail (general IHC/IF practice).	Use the separate IF/ICC guide to evaluate subcellular detail; for this IHC section, score the relevant cells and cytoplasmic distribution (HPA tissue IHC).

Source: UniProt Q14697 Human Protein Atlas tissue Human Protein Atlas subcellular

Experiment evidence

IHC & IF images showing GANAB staining

IHC analysis of GANAB using anti-GANAB antibody (A09668-2). GANAB was detected in a paraffin-embedded section of human placenta tissue. Heat mediated antigen retrieval was performed in EDTA buffer (pH 8.0, epitope retrieval solution). The tissue section was blocked with 10% goat serum. The tissue section was then incubated with 2 μg/ml rabbit anti-GANAB Antibody (A09668-2) overnight at 4°C. Peroxidase Conjugated Goat Anti-rabbit IgG was used as secondary antibody and incubated for 30 minutes at 37°C. The tissue section was developed using HRP Conjugated Rabbit IgG Super Vision Assay Kit (Catalog # SV0002) with DAB as the chromogen.

A09668-2 · IHCIHC analysis of GANAB using anti-GANAB antibody (A09668-2). GANAB was detected in a paraffin-embedded section of human placenta tissue. Heat

IF analysis of GANAB using anti-GANAB antibody (A09668-2). GANAB was detected in an immunocytochemical section of HELA cells. Enzyme antigen retrieval was performed using IHC enzyme antigen retrieval reagent (AR0022) for 15 mins. The cells were blocked with 10% goat serum. And then incubated with 5 μg/mL rabbit anti-GANAB Antibody (A09668-2) overnight at 4°C. DyLight®488 Conjugated Goat Anti-Rabbit IgG (BA1127) was used as secondary antibody at 1:500 dilution and incubated for 30 minutes at 37°C. The section was counterstained with DAPI. Visualize using a fluorescence microscope and filter sets appropriate for the label used.

A09668-2 · IFIF analysis of GANAB using anti-GANAB antibody (A09668-2). GANAB was detected in an immunocytochemical section of HELA cells. Enzyme antigen

HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000089597-GANAB/tissue/cerebral+cortex#imid_18888453

HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000089597-GANAB/tissue/colon#imid_18888379

HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000089597-GANAB/tissue/liver#imid_18888380

HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000089597-GANAB/tissue/kidney#imid_18888373

HPA · ICC-IF MCF-7Human Protein Atlas immunofluorescence, MCF-7, antibody HPA061426; green = GANAB, blue = nucleus, red = microtubules.

← swipe / scroll for more images →

Real IHC / IF data behind the staining-pattern expectations in this section.

Sample controls for GANAB IHC & IF

🧪Run appendix first and score GANAB staining in glandular cells (HPA: High in appendix glandular cells). Use skeletal muscle myocytes as the negative tissue (HPA: Not detected in skeletal muscle myocytes); on the appendix slide, count neighboring cells as internal negative comparators only when they lack specific staining, without assuming a cell type is GANAB-negative.

Positive control tissue: Appendix (Glandular cells, HPA High)

Negative control tissue: Adipose tissue (HPA Not detected)

ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show GANAB in MCF-7, Rh30, U2OS, hTERT-RPE1 (serum starved), with annotated localisation: Endoplasmic reticulum (supported) (HPA subcellular).

Technical controls: Include a no-primary (secondary-only) control, a host- and clonality-matched rabbit IgG isotype control (caption: rabbit primary), and, if available, a matched GANAB knockout sample as a biological negative. Block endogenous peroxidase and check inflammatory cells for residual DAB signal in the appendix section (standard chromogenic IHC practice).

⚠️Feasibility: Paraffin-section IHC is demonstrated with heat retrieval in EDTA at pH 8.0 (selected-SKU caption: A09668-2); whether retrieval is required has not been established by the supplied evidence. The fixative is unreported in that caption, and no target-specific fixation window or fixation effect is reported. ICC-IF images support an endoplasmic reticulum pattern (HPA: supported ER localization), but the supplied evidence does not establish that frozen sections or IF are easier than paraffin IHC; inflammatory-cell peroxidase can complicate appendix DAB interpretation (standard chromogenic IHC practice).

HPA tissue IHC evidence for GANAB

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.

Positive expression · recommended positive controls

Tissue	Cell type	Level	Evidence	Source
Appendix	Glandular cells	High	Protein (IHC)	HPA →
Cerebellum	GLUC cells - cytoplasm/membrane	High	Protein (IHC)	HPA →
Cerebral cortex	Neuronal cells	High	Protein (IHC)	HPA →
Duodenum	Glandular cells	High	Protein (IHC)	HPA →
Epididymis	Glandular cells	High	Protein (IHC)	HPA →

Undetected expression · recommended negative controls

Tissue	Cell type	Level	Evidence	Source
Adipose tissue	Adipocytes	Not detected	Protein (IHC)	HPA →
Heart muscle	Cardiomyocytes	Not detected	Protein (IHC)	HPA →
Ovary	Ovarian stroma cells	Not detected	Protein (IHC)	HPA →
Parathyroid gland	Glandular cells	Not detected	Protein (IHC)	HPA →
Skeletal muscle	Myocytes	Not detected	Protein (IHC)	HPA →

Section 3

Advanced GANAB IHC Tips

Troubleshoot GANAB staining by checking retrieval, cell compartment, and controls before comparing signal across paraffin sections.

What retrieval should I try first when GANAB staining is weak?

Start with heat-mediated retrieval in EDTA at pH 8.0 for paraffin sections stained with the catalog antibody (datasheet A09668-2). Apply one consistent heating and cooling schedule across the comparison set, then inspect both signal and tissue integrity before increasing retrieval time. The product image used this retrieval in a paraffin section of human placenta, with 2 μg/ml primary antibody incubated overnight at 4°C (datasheet A09668-2). If staining remains weak, compare a modestly longer EDTA retrieval with the original schedule on adjacent sections; document any gain in cellular signal alongside increased background or tissue damage. Keep detection conditions constant during that comparison.

How should I troubleshoot weak GANAB staining when fixation history is uncertain?

Treat GANAB sensitivity to fixation as unknown: the selected paraffin tissue caption does not state a fixative (datasheet A09668-2). Record the fixative, fixation interval, section age, and processing history for each specimen before changing antibody concentration. If matched sections are available, compare them under the same EDTA pH 8.0 retrieval and detection conditions (datasheet A09668-2). Include a placenta section processed with a documented, repeatable workflow as a staining control; trophoblastic cells show high GANAB staining in the tissue atlas (HPA: High in placental trophoblastic cells). A failed control points to the staining run, while discordant specimens warrant a review of their individual processing histories.

Where should convincing GANAB staining appear in paraffin sections?

Assess GANAB primarily as an intracellular cytoplasmic pattern with a perinuclear emphasis, consistent with its supported endoplasmic reticulum location (HPA subcellular: endoplasmic reticulum supported). Golgi localization is also annotated, while melanosome association comes from fraction mass spectrometry (UniProt Q14697: subcellular location). GANAB has a signal peptide spanning residues 1–28 and no annotated transmembrane segment, so a crisp cell surface outline alone deserves scrutiny (UniProt Q14697: processing and topology). Compare staining within intact cells against the matched negative control and the local tissue architecture. In placenta, prioritize interpretable trophoblastic cell staining over diffuse extracellular DAB; those cells have high reported tissue staining (HPA: High in placental trophoblastic cells).

Could GANAB isoforms or processing explain different staining patterns?

GANAB has 3 annotated isoforms, and isoforms 1 and 2 are reported in kidney and liver (UniProt Q14697: isoforms and tissue specificity). The precursor carries a signal peptide at residues 1–28; the annotated mature chain spans residues 29–944 (UniProt Q14697: processing). One glycosylation site is annotated at residue 97 and a phosphoserine at residue 52, but the supplied antibody evidence does not map its epitope (UniProt Q14697: modifications; datasheet A09668-2). Check whether any available epitope documentation covers all isoforms before assigning a tissue difference to splice variation. Compare serial sections and matched controls under identical retrieval conditions first.

How can I assess GANAB by multiplex IF alongside a cell-type marker?

Use the IF experiment as a separate validation: the supplied product example documents chromogenic staining of paraffin placenta, not an IF protocol (datasheet A09668-2). Pair GANAB with a validated trophoblastic cell marker in placenta, where trophoblastic cells have high reported staining, and include single-channel controls (HPA: High in placental trophoblastic cells). Choose a far-red GANAB fluorophore if shorter wavelengths show tissue autofluorescence, and inspect unstained sections before setting exposure. For an intracellular ER target, test mild permeabilisation such as 0.1% Triton X-100 for 10 minutes after fixation, with a parallel untreated sample; ER localisation is supported (HPA subcellular: endoplasmic reticulum supported). Evaluate channel bleed-through and compartment agreement before interpreting overlap.

What should I change when DAB background obscures GANAB staining?

First inspect a no-primary control under the same DAB development conditions to separate antibody-associated staining from detection background. The product image used 10% goat serum blocking, a peroxidase-conjugated secondary, and DAB development in paraffin placenta (datasheet A09668-2). Add a standard endogenous peroxidase block before primary incubation, then compare shorter DAB development and more thorough washes on adjacent sections. If diffuse staining persists, titrate the primary below the illustrated 2 μg/ml concentration while holding retrieval at EDTA pH 8.0 (datasheet A09668-2). Judge each adjustment by retained cellular pattern and the no-primary control, not by overall section darkness.

How should I quantify GANAB staining across differently processed sections? ⚠ ANSWER MARKED FOR VERIFICATION

Score intact cells within predefined tissue regions using an H-score: multiply the percentage at each intensity from 0 to 3 by its intensity, then sum the products. Report the percentage of positive cells alongside the H-score, and define the positivity threshold from the matched negative control. Normalize comparisons to the same cell population and assessed tissue area; use positive cells per mm² when cell density varies. GANAB shows ubiquitous cytoplasmic expression with low tissue RNA specificity, so region and cell-type annotation matter when comparing specimens (HPA: tissue IHC profile and RNA specificity). Keep retrieval, illumination, DAB development, and scoring rules consistent within each analysis batch.

How do I distinguish genuine GANAB signal from staining artefact?

Favor reproducible intracellular staining in intact cells that agrees with GANAB's supported ER location, allowing for its annotated Golgi location (HPA subcellular: endoplasmic reticulum supported; UniProt Q14697: subcellular location). Placental trophoblastic cells provide a reported high-staining reference, whereas adipocytes are reported as not detected in the tissue atlas (HPA: tissue IHC). Question isolated nuclear, extracellular, or sharply peripheral staining, especially when it tracks section edges or necrotic areas rather than viable cells. Check a no-primary section for endogenous peroxidase or nonspecific DAB deposition, and compare adjacent sections at the same retrieval and development settings. Interpret a changed pattern only after controls and cell identity agree.

Boster reagents

Best GANAB / Neutral alpha-glucosidase AB IHC Antibodies

A09668-2 has IHC data from human placenta paraffin sections and IF data from HeLa cells and human placenta paraffin sections (catalog image captions).

Real IHC data

Anti-GANAB Antibody ®

Cat # A09668-2

View product →

A09668-2 was demonstrated by IHC on a human placenta paraffin section with EDTA pH 8.0 retrieval and DAB detection (IHC image caption). The same SKU has IF images from HeLa cells and a human placenta paraffin section (IF image captions).

Which to pick: Choose A09668-2 for tissue IHC: its own image documents a human placenta paraffin section, while the fixative is unreported (IHC image caption). Choose A09668-2 for IF/ICC because both applications are listed and its IF images show HeLa cells and human placenta (catalog applications; IF image captions). For cross-species work, A09668-2 lists human, mouse and rat reactivity, although its supplied IHC image documents human tissue only; it has a rabbit host, and clonality is unreported (catalog reactivity and host; IHC image caption; catalog clone field).

Each figure is that product's own IHC / IF validation image from its datasheet.

References

UniProt Consortium. UniProt entry Q14697 (GANAB_HUMAN, Neutral alpha-glucosidase AB).
Human Protein Atlas. GANAB tissue IHC expression (reliability: Enhanced).
Human Protein Atlas. GANAB subcellular location (ICC-IF): Localized to the endoplasmic reticulum..
Human Protein Atlas. GANAB antibody validation summary (2 antibodies).
Glucosidase GANAB drives colorectal cancer progression through Wnt signaling and is modulated by lncRNA FIRRE. Frontiers in molecular biosciences 2026 — PMC13526586.
Glycoprotein α-Subunit of Glucosidase II (GIIα) is a novel prognostic biomarker correlated with unfavorable outcome of urothelial carcinoma. BMC cancer 2022 — PMC9316353.
Low expression of m6A reader YTHDC1 promotes progression of ovarian cancer via PIK3R1/STAT3/GANAB axis. International journal of biological sciences 2023 — PMC10535707.
A five-mRNA signature associated with post-translational modifications can better predict recurrence and survival in cervical cancer. Journal of cellular and molecular medicine 2020 — PMC7294153.
PubMed PMID:10929008 — UniProt-cited evidence.
PubMed PMID:16554811 — UniProt-cited evidence.
PubMed PMID:7788527 — UniProt-cited evidence.