GALNS / N-acetylgalactosamine-6-sulfatase · IHC design guide

Design Immunohistochemistry for GALNS

Plan chromogenic GALNS IHC in paraffin sections using the catalog antibody at 0.5–1 μg/mL (datasheet A02954-1). Use colon glandular cells as a high-staining reference and assess the granular cytoplasmic pattern (HPA tissue IHC).

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

Immunohistochemistry protocol sheet for GALNS (IHC for GALNS): expected localisation Granular cytoplasm (HPA tissue IHC); lysosome (UniProt), antibody A02954-1, validated IHC image, and IHC protocol steps — Printable **GALNS** IHC protocol sheet — expected localisation Granular cytoplasm (HPA tissue IHC); lysosome (UniProt), antibody A02954-1, controls and protocol steps. Open the full GALNS IHC guide →

Navigate to: Protocols Staining pattern Controls Antibodies

GALNS 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	Granular cytoplasm (HPA tissue IHC); lysosome (UniProt)
	Staining pattern	Granular cytoplasmic staining in most tissues (HPA tissue IHC)
	Antigen retrieval	Citrate pH 6 HIER, heat-mediated (datasheet A02954-1)
	Positive control ⓘ	Adrenal gland+4 more · see all
	Negative control ⓘ	Adipose tissue+1 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	Adipocytes and chondrocytes may be unstained (HPA tissue IHC)
	Regulation	No expression regulator annotated (UniProt)
	Isoform / epitope	No annotated isoforms; mature chain spans residues 27–522 (UniProt)

Section 1

Recommended GALNS IHC & IF Protocols

The catalog antibody’s IHC-P protocol (datasheet: A02954-1) is presented alongside four published GALNS IHC methods (PMC4125552; PMC13535944; PMC12839894; PMC12269278).

Recommended immunohistochemistry (IHC-P) protocol parameters
Sample	Paraffin-embedded rat small intestine tissue; fixative not specified (datasheet A02954-1)
Fixation	Image fixative and duration unreported (datasheet A02954-1); verify before use.
Sectioning	4–5 µm sections on charged slides (standard)
Deparaffinisation	Xylene, graded ethanol series to water (standard)
Antigen retrieval	Heat retrieval: Citrate pH 6, 20 min (datasheet A02954-1)
Peroxidase block	3% H2O2, 10 min, room temperature (standard)
Blocking	10% goat serum (datasheet A02954-1)
Primary antibody	Rabbit anti-GALNS, 0.5-1μg/ml (datasheet A02954-1)
Primary incubation	Overnight at 4 °C (datasheet A02954-1)
Detection	Streptavidin-biotin complex (SABC), DAB chromogen (datasheet A02954-1)
Counterstain	Hematoxylin, blue, dehydrate and mount (standard)
Expected result	GALNS-positive staining in glandular cells of adrenal gland (HPA tissue IHC: High). HPA tissue profile: Granular cytoplasmic expression in most tissues. No signal in the no-primary control.

💡Decision noteStart with heat-mediated citrate retrieval at pH 6 (datasheet: A02954-1). A published prostate protocol used pH 6.1 at 90°C for 40 minutes (PMC4125552).

Section 2

What Is the Expected GALNS Staining Pattern?

GALNS is a lysosomal enzyme with no transmembrane segment (UniProt P34059). In paraffin section IHC, expect granular cytoplasmic staining in many tissues, including glandular cells of the colon and adrenal gland and hematopoietic cells of bone marrow (HPA: tissue IHC). HPA rates the tissue pattern Supported, with medium consistency between antibody staining and RNA expression (HPA: tissue IHC).

What am I looking at on my slide?
Granular cytoplasmic staining in colon glandular cells.	This matches the reported tissue pattern and a High cell level (HPA: tissue IHC). Score staining in glandular cells rather than treating all cells in the section as equally positive; the enzyme’s lysosomal annotation supports an intracellular interpretation (UniProt P34059).
Predominantly nuclear staining, or a sharp outline of the plasma membrane.	That distribution conflicts with the reported granular cytoplasmic IHC pattern (HPA: tissue IHC) and with the lack of a transmembrane segment (UniProt P34059). Treat it as a possible artefact and compare it with controls before assigning it to GALNS (standard IHC practice).
Strong staining in adipocytes or chondrocytes.	These cells were Not detected in the listed adipose and soft tissue observations, respectively (HPA: tissue IHC). An unexpected signal warrants checks for cross-reactivity and endogenous chromogen producing activity (standard IHC practice); these observations do not establish that every specimen must be negative.
Diffuse color throughout cells, stroma, or a blank area of the section.	A diffuse field obscures the granular cytoplasmic pattern reported for GALNS (HPA: tissue IHC). Check reagent background, blocking, washes, and detection controls before scoring individual cells (standard IHC practice); diffuse color alone does not identify GALNS.
No signal in a known positive tissue, such as colon glandular cells.	Colon glandular cells are reported at High staining level (HPA: tissue IHC). First check section integrity, detection controls, and whether the assay produced a readable counterstain (standard IHC practice); a blank run alone cannot establish biological absence.

💡Expected GALNS appearanceCall a result positive when the relevant cells show distinct granular cytoplasmic color, especially at the reported High level in colon glandular cells (HPA: tissue IHC); diffuse field color or dominant nuclear staining is suspect (standard IHC practice).

How each factor affects the staining
Compartment and assay readout	UniProt places GALNS in lysosomes (UniProt P34059), while HPA describes granular cytoplasmic tissue IHC and approved cytosolic ICC-IF localization (HPA: tissue IHC; HPA: subcellular). Interpret each assay using its own observed pattern; these annotations do not prove that every visible granule is a lysosome.
Tissue and cell choice	HPA reports High staining in adrenal, colon, duodenal, endometrial, and epididymal glandular cells, among other listed cells (HPA: tissue IHC). It reports adipocytes and chondrocytes as Not detected (HPA: tissue IHC). Select and score controls by cell type, not tissue name alone (standard IHC practice).
Strength of tissue evidence	The GALNS tissue IHC profile is Supported, with medium consistency between staining and RNA expression (HPA: tissue IHC). HPA lists 3 antibodies with Supported IHC status—HPA042433, HPA074225, and CAB026404 (HPA: antibodies). This supports comparison with the reported pattern without guaranteeing specificity in a new specimen.
Processing and epitope information	UniProt annotates a signal peptide at residues 1–26, a mature chain at 27–522, and glycosylation sites at 204 and 423 (UniProt P34059). No antibody epitope or GALNS specific fixation effect is supplied; these features cannot justify a predicted retrieval condition or loss of staining.
IF/ICC interpretation	What should an IF/ICC image show? HPA approves a cytosolic localization and lists A-431, U-251MG, and U2OS images (HPA: subcellular). The tissue IHC profile instead describes granular cytoplasm (HPA: tissue IHC). CAB026404 has Uncertain ICC status, so review IF signal with assay specific controls (HPA: antibodies; standard IF practice).

Why is my staining missing, weak or wrong?
Situation	Likely cause	Next action
Positive control tissue is blank.	The cause is undetermined; colon glandular cells are reported High (HPA: tissue IHC).	Check section quality, primary antibody application, detection reagents, and counterstain with routine run controls; consider retrieval optimization as general paraffin IHC practice, without assuming GALNS has a known fixation sensitivity (standard IHC practice).
Nuclei dominate the signal.	The localization disagrees with granular cytoplasmic tissue IHC (HPA: tissue IHC).	Compare primary omission and other detection controls, inspect staining at the cellular level, and withhold a GALNS positive call until the cytoplasmic pattern is reproducible (standard IHC practice).
Adipocytes or chondrocytes look strongly positive.	Those cells were Not detected in the supplied HPA observations (HPA: tissue IHC).	Check background and endogenous detection activity with suitable controls, then repeat or corroborate the cell assignment before interpreting the signal as GALNS (standard IHC practice).
The entire section develops diffuse color.	Diffuse color cannot resolve the reported granular cytoplasmic distribution (HPA: tissue IHC).	Inspect no-primary and detection controls, washes, and blocking; adjust general staining conditions until cellular detail can be scored (standard IHC practice).
A low staining cell type appears weaker than a high staining control.	HPA reports Low staining in lung alveolar type II cells and smooth muscle cells, versus High staining in colon glandular cells (HPA: tissue IHC).	Score the named cell types separately under comparable detection conditions; do not turn a weak low level observation into a failed run solely because a high level control is brighter (standard IHC practice).
IF/ICC looks broadly cytosolic while tissue IHC looks granular.	Those are the respective HPA readouts: approved cytosolic ICC-IF and granular cytoplasmic tissue IHC (HPA: subcellular; HPA: tissue IHC).	Evaluate each image against its assay specific localization and controls; do not use the IF appearance alone to reject an otherwise convincing tissue IHC pattern (standard IHC/IF practice).

Source: UniProt P34059 Human Protein Atlas tissue Human Protein Atlas subcellular

Experiment evidence

IHC & IF images showing GALNS staining

IHC analysis of GALNS using anti-GALNS antibody (A02954-1). GALNS was detected in paraffin-embedded section of rat small intestine tissue. Heat mediated antigen retrieval was performed in citrate buffer (pH6, epitope retrieval solution) for 20 mins. The tissue section was blocked with 10% goat serum. The tissue section was then incubated with 1μg/ml rabbit anti-GALNS Antibody (A02954-1) overnight at 4°C. Biotinylated goat anti-rabbit IgG was used as secondary antibody and incubated for 30 minutes at 37°C. The tissue section was developed using Strepavidin-Biotin-Complex (SABC)(Catalog # SA1022) with DAB as the chromogen.

A02954-1 · IHCIHC analysis of GALNS using anti-GALNS antibody (A02954-1). GALNS was detected in paraffin-embedded section of rat small intestine tissue. H

IHC analysis of GALNS using anti-GALNS antibody (A02954-1). GALNS was detected in paraffin-embedded section of mouse liver tissue. Heat mediated antigen retrieval was performed in citrate buffer (pH6, epitope retrieval solution) for 20 mins. The tissue section was blocked with 10% goat serum. The tissue section was then incubated with 1μg/ml rabbit anti-GALNS Antibody (A02954-1) overnight at 4°C. Biotinylated goat anti-rabbit IgG was used as secondary antibody and incubated for 30 minutes at 37°C. The tissue section was developed using Strepavidin-Biotin-Complex (SABC)(Catalog # SA1022) with DAB as the chromogen.

A02954-1 · IHCIHC analysis of GALNS using anti-GALNS antibody (A02954-1). GALNS was detected in paraffin-embedded section of mouse liver tissue. Heat medi

HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000141012-GALNS/tissue/cerebral+cortex#imid_16818443

HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000141012-GALNS/tissue/colon#imid_16818513

HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000141012-GALNS/tissue/liver#imid_16818514

HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000141012-GALNS/tissue/kidney#imid_16818515

HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody CAB026404; green = GALNS, blue = nucleus, red = microtubules.

← swipe / scroll for more images →

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

Sample controls for GALNS IHC & IF

🧪Run colon first: glandular cells should stain (HPA: High in colon glandular cells). Use adipose tissue as the negative tissue (HPA: Not detected in adipocytes); on the colon slide, cells without glandular-cell staining should remain at background, but the supplied HPA rows do not establish a specific internal cell type as GALNS-negative.

Positive control tissue: Adrenal gland (Glandular cells, HPA High)

Negative control tissue: Adipose tissue (HPA Not detected)

ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show GALNS in A-431, U-251MG, U2OS, with annotated localisation: Cytosol (approved) (HPA subcellular).

Technical controls: Include no-primary (secondary-only), a concentration-matched rabbit IgG isotype control matching the catalog antibody’s format, and GALNS-knockout material as a biological negative (caption: rabbit anti-GALNS antibody; standard IHC controls). Check the colon slide for endogenous peroxidase signal with the no-primary control before interpreting DAB staining (caption: DAB detection; standard chromogenic IHC practice).

⚠️Feasibility: The selected A02954-1 paraffin-section caption does not state a fixative, and the supplied evidence reports no target-specific fixation window or fixation effect (caption: fixative not stated). Heat retrieval in citrate buffer at pH 6 for 20 minutes is a documented starting condition, but retrieval dependency has not been established (caption: citrate retrieval for 20 minutes). The supplied evidence does not establish whether frozen sections are easier; IF/ICC images exist for A-431, U-251MG and U2OS, while reported cytosolic ICC/IF localization differs from the UniProt lysosomal annotation, so interpret localization with appropriate controls (HPA: Cytosol approved; UniProt P34059: Lysosome).

HPA tissue IHC evidence for GALNS

Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Supported — 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
Adrenal gland	Glandular cells	High	Protein (IHC)	HPA →
Bone marrow	Hematopoietic cells	High	Protein (IHC)	HPA →
Cerebellum	Molecular layer cells - cytoplasm/membrane	High	Protein (IHC)	HPA →
Cerebral cortex	Neuronal cells	High	Protein (IHC)	HPA →
Colon	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 →
Soft tissue	Chondrocytes	Not detected	Protein (IHC)	HPA →

Section 3

Advanced GALNS IHC Tips

Troubleshoot GALNS staining in paraffin sections by checking retrieval, compartment, cell identity and controls before comparing signal intensity (UniProt P34059; HPA tissue IHC).

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

Start with heat-mediated retrieval in citrate buffer at pH 6 for 20 minutes (datasheet A02954-1). The selected paraffin-section example then used 10% goat serum block and 1 µg/ml antibody overnight at 4°C, so match those conditions before changing retrieval (datasheet A02954-1). If staining remains weak, compare a more alkaline retrieval condition on matched sections while keeping detection and exposure constant (standard IHC practice). Judge improvement by preserved morphology and granular cytoplasmic signal in appropriate cells, rather than stronger staining alone (HPA: granular cytoplasmic expression in most tissues; standard IHC practice).

Could fixation explain variable GALNS staining between paraffin sections?

GALNS-specific fixation sensitivity is unknown because the selected tissue caption identifies paraffin embedding but does not state a fixative (datasheet A02954-1). Record the actual fixative and fixation time for each specimen, and compare sections processed together before assigning a staining difference to biology (standard IHC practice). Keep section thickness, citrate retrieval at pH 6 for 20 minutes, and antibody incubation consistent during that comparison (datasheet A02954-1; standard IHC practice). If a batch stains poorly, inspect morphology and a suitable independent staining control; neither the reported tissue pattern nor GALNS protein features establish a fixation effect (HPA tissue IHC; UniProt P34059).

Should GALNS appear lysosomal or diffuse in chromogenic tissue sections?

Expect predominantly granular cytoplasmic staining in tissue sections, consistent with the reported GALNS tissue profile (HPA: granular cytoplasmic expression in most tissues). GALNS is annotated as a lysosomal enzyme without a transmembrane segment, while the separate cell-based subcellular record assigns it to the cytosol (UniProt P34059; HPA subcellular: cytosol approved). Resolve that discrepancy with a lysosomal marker on matched material and a validated control before calling diffuse staining specific (standard IHC practice). Record whether signal is punctate, diffuse or confined to section edges, because chromogenic resolution alone cannot establish that individual granules are lysosomes (standard IHC practice).

How should an unknown antibody epitope affect GALNS troubleshooting?

Do not assign a particular processed form or subcellular face to staining without an epitope map for the catalog antibody (standard antibody validation practice). The GALNS record lists 0 isoforms, a signal peptide at residues 1–26, and a mature chain at 27–522 (UniProt P34059). It also lists glycosylation at residues 204 and 423 and a modified residue at 79, but these annotations do not identify the antibody epitope (UniProt P34059). If retrieval changes the staining pattern, compare matched sections and independent specificity controls before attributing the change to processing or glycosylation (standard IHC practice).

How can I assess GALNS by IF alongside a cell identity marker?

Treat IF as a separate validation exercise: the selected antibody evidence describes chromogenic staining in paraffin sections, with no IF conditions supplied (datasheet A02954-1). Multiplex GALNS with a glandular epithelial marker when examining glandular cells, which have high reported staining in duodenum and colon (HPA tissue IHC; standard IF practice). Choose a spectrally separated, preferably far-red fluorophore after checking tissue autofluorescence and single-color controls (standard IF practice). Permeabilize for an intralysosomal epitope only if epitope mapping supports that location; GALNS lacks a transmembrane segment, but its antibody epitope and accessibility are unspecified (UniProt P34059; standard IF practice).

What should I check when DAB obscures GALNS granules?

First compare a no-primary control with the stained section to distinguish detection background from antibody-dependent signal (standard IHC practice). The selected example uses a biotinylated secondary, streptavidin–biotin detection and DAB, so assess endogenous biotin and peroxidase activity with appropriate controls and blocking steps (datasheet A02954-1; standard IHC practice). Keep the reported 10% goat serum block as a starting condition and inspect whether background increases outside expected cell compartments (datasheet A02954-1; HPA tissue IHC). Shorten chromogen development or adjust antibody concentration only through matched comparisons, preserving the controls needed to judge granular cytoplasmic staining (standard IHC practice; HPA tissue IHC).

How should I score GALNS staining across tissue regions? ⚠ ANSWER MARKED FOR VERIFICATION

Define cell populations and regions before scoring, because GALNS is reported in most tissues with differing cell-level intensity (HPA tissue IHC). For cell-based comparisons, report the percentage of positive cells and an H-score from 0–300; use positive-cell density per mm² when cell counts per area better fit the specimen (standard IHC scoring practice). Normalize each readout to viable tissue area or the number of evaluable cells in the specified population, and keep threshold, retrieval and imaging conditions fixed (standard IHC practice). Report compartment and staining pattern alongside the score, since granular cytoplasmic expression is the tissue reference pattern (HPA tissue IHC).

How do I distinguish specific GALNS staining from a tissue artefact?

Give most weight to reproducible granular cytoplasmic staining in an anatomically identified cell population, alongside clean controls (HPA tissue IHC; standard IHC practice). High glandular-cell staining is reported in duodenum and colon, whereas adipocytes and chondrocytes are reported as not detected; use those observations as context, not universal controls (HPA tissue IHC). Question strong nuclear-only signal, section-edge staining, necrotic regions or DAB deposits that persist without primary antibody (UniProt P34059: lysosome; standard IHC practice). Check endogenous peroxidase contribution when DAB is used, and treat the reported cytosolic cell-based localisation as a reason to verify compartment assignments independently (datasheet A02954-1; HPA subcellular; standard IHC practice).

Boster reagents

Best GALNS / N-acetylgalactosamine-6-sulfatase IHC Antibodies

A02954-1 has real paraffin-section IHC images from rat small intestine, mouse and rat liver, and human mammary cancer tissue (catalog image captions). No IF/ICC data are supplied (catalog applications and image captions).

Real IHC data

Anti-GALNS Antibody ®

Cat # A02954-1

View product →

A02954-1 is listed for IHC in human, mouse, and rat (catalog applications and reactivity). Its IHC images show paraffin sections of rat small intestine, mouse and rat liver, and human mammary cancer tissue (catalog image captions).

Which to pick: For tissue IHC, choose the polyclonal A02954-1, which has paraffin-section images and a recommended concentration of 0.5–1 μg/ml (catalog dilution and image captions). It is the cross-species choice for human, mouse, and rat (catalog reactivity); the image captions do not report the fixative (catalog image captions). No listed SKU is validated for IF/ICC, so there is no supported IF/ICC pick here (catalog applications and image captions).

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

References

UniProt Consortium. UniProt entry P34059 (GALNS_HUMAN, N-acetylgalactosamine-6-sulfatase).
Human Protein Atlas. GALNS tissue IHC expression (reliability: Supported).
Human Protein Atlas. GALNS subcellular location (ICC-IF): Localized to the cytosol..
Human Protein Atlas. GALNS antibody validation summary (3 antibodies).
Differential effects of estrogen exposure on arylsulfatase B, galactose-6-sulfatase, and steroid sulfatase in rat prostate development. The Journal of steroid biochemistry and molecular biology 2014 — PMC4125552.
Assessment of different promoters in lentiviral vectors for expression of the N-acetyl-galactosamine-6-sulfate sulfatase gene. Journal of human genetics 2025 — PMC13535944.
Collagen Type II-Targeting Lentiviral Gene Therapy for Mucopolysaccharidosis IVA. Current issues in molecular biology 2025 — PMC12839894.
In vivo direct lentiviral gene therapy improves disease pathology in a mucopolysaccharidosis IVA murine model. Molecular therapy. Methods & clinical development 2025 — PMC12269278.
PubMed PMID:1755850 — UniProt-cited evidence.
PubMed PMID:8001980 — UniProt-cited evidence.
PubMed PMID:15489334 — UniProt-cited evidence.