HSPB2 / Heat shock protein beta-2 · IHC design guide

Design Immunohistochemistry for HSPB2

Plan HSPB2 paraffin-section IHC around cytoplasmic staining in heart and skeletal muscle (HPA tissue IHC). This guide covers fixation consistency, tissue controls and chromogenic scoring while accounting for the reported mismatch between antibody staining and RNA expression (HPA tissue IHC).

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

Immunohistochemistry protocol sheet for HSPB2 (IHC for HSPB2): expected localisation Cytoplasmic tissue staining (HPA tissue IHC); nuclear foci annotated (UniProt), antibody PA1802, validated IHC image, and IHC protocol steps — Printable **HSPB2** IHC protocol sheet — expected localisation Cytoplasmic tissue staining (HPA tissue IHC); nuclear foci annotated (UniProt), antibody PA1802, controls and protocol steps. Open the full HSPB2 IHC guide →

Navigate to: Protocols Staining pattern Controls Antibodies

HSPB2 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); nuclear foci annotated (UniProt)
	Staining pattern	Cytoplasmic cardiomyocytes and skeletal myocytes (HPA tissue IHC)
	Antigen retrieval	EDTA pH 8.0 HIER, heat-mediated (datasheet PA1802)
	Positive control ⓘ	Heart muscle+3 more · see all
	Negative control ⓘ	Appendix+4 more · see all

Important caveats

Reasons your staining may differ from the expected pattern.

	Fixation	Keep fixation consistent across sections. (standard IHC practice; not target-specific)
	Caveat	Antibody staining has low agreement with RNA expression (HPA tissue IHC)
	Regulation	Preferential expression in skeletal and heart muscle (UniProt)
	Isoform / epitope	No annotated isoforms; one 1–182 chain (UniProt)

Section 1

Recommended HSPB2 IHC & IF Protocols

The catalog antibody protocol uses EDTA pH 8.0 retrieval (datasheet: PA1802). One published gastric tissue microarray protocol uses gastric enzyme retrieval (PMC12162319).

Recommended immunohistochemistry (IHC-P) protocol parameters
Sample	Paraffin-embedded human heart tissue; fixative not specified (datasheet PA1802)
Fixation	Image fixative and duration unreported (datasheet PA1802); 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 PA1802); 20 min, 95–100 °C (standard)
Peroxidase block	3% H2O2, 10 min, room temperature (standard)
Blocking	10% goat serum (datasheet PA1802)
Primary antibody	Rabbit anti-HSPB2, 2 μg/ml (datasheet PA1802)
Primary incubation	Overnight at 4 °C (datasheet PA1802)
Detection	HRP-conjugated secondary, DAB chromogen (datasheet PA1802)
Counterstain	Hematoxylin, blue, dehydrate and mount (standard)
Expected result	HSPB2-positive staining in cardiomyocytes of heart muscle (HPA tissue IHC: Medium). HPA tissue profile: Cytoplasmic expression in several tissues, including heart and skeletal muscle. No signal in the no-primary control.

💡Decision noteStart with EDTA pH 8.0 heat retrieval for the catalog antibody (datasheet: PA1802); consider gastric enzyme retrieval when adapting the published method (PMC12162319).

Section 2

What Is the Expected HSPB2 Staining Pattern?

HSPB2 is reported in the cytoplasm and nucleus, including nuclear foci; it has no transmembrane segment (UniProt Q16082). In tissue IHC, expect cytoplasmic staining in cardiomyocytes and skeletal myocytes, with staining also reported in kidney tubule and placental decidual cells (HPA tissue IHC). HPA rates its tissue staining Approved but reports low consistency with RNA expression, so interpret the pattern alongside controls (HPA tissue IHC).

What am I looking at on my slide?
Cytoplasmic staining in cardiomyocytes or skeletal myocytes, around the reported medium level (HPA tissue IHC).	This fits the reported tissue pattern and UniProt's cytoplasmic location (HPA tissue IHC; UniProt Q16082). Compare the cells and compartment with the control section; a brown deposit elsewhere does not establish HSPB2 expression (general IHC practice).
Predominantly cell-surface, extracellular or broadly nonspecific nuclear staining, with little cytoplasmic signal.	Recheck compartment assignment and controls: HSPB2 has no transmembrane segment, while UniProt reports cytoplasm and nuclear foci (UniProt Q16082). Nuclear staining alone is not automatically false; HPA also reports nucleoplasm in ICC-IF (HPA subcellular).
Prominent staining in appendix glandular cells or breast adipocytes, where HPA reports no detection (HPA tissue IHC).	Treat this as discordant with those cell-specific observations, not proof that the entire tissue is negative (HPA tissue IHC). Cross-reactivity, endogenous detection activity or misidentified cells are possibilities to test with controls (general IHC practice).
Brown precipitate spreads across stroma, lumen and multiple cell types without clear cellular boundaries.	A diffuse deposit cannot be confidently scored as cytoplasmic HSPB2 staining (general IHC practice; HPA tissue IHC). Check whether the same pattern appears when the primary antibody is omitted; that comparison can reveal detection-system background (general IHC practice).
No signal in cardiomyocytes or skeletal myocytes on a slide intended as a positive control (HPA tissue IHC).	First assess tissue preservation, antibody and detection controls, and whether the expected cells are present (general IHC practice). HPA reports medium staining rather than universal staining and notes low agreement with RNA, so one blank section does not settle expression (HPA tissue IHC).

💡Expected HSPB2 appearanceCall a positive result when identifiable cardiomyocytes or skeletal myocytes show cytoplasmic staining around HPA's reported medium level; broad deposit outside cells or dominant surface staining is suspect (HPA tissue IHC; UniProt Q16082; general IHC practice).

How each factor affects the staining
Which cells provide a tissue benchmark?	Heart cardiomyocytes and skeletal myocytes have medium HPA staining; kidney tubule and placental decidual cells are additional reported medium-positive cell populations (HPA tissue IHC). These are cell-specific observations, not guarantees for every section (HPA tissue IHC).
How strong is the tissue evidence?	HPA labels tissue IHC Approved and lists antibody HPA079414 as IHC Approved, while explicitly noting low consistency between staining and RNA expression (HPA tissue IHC; HPA antibodies). Read intensity with that limitation in mind (HPA tissue IHC).
Does protein structure predict a membrane pattern?	UniProt lists the 182-residue chain without a signal peptide, propeptide or transmembrane segment, and assigns cytoplasm and nucleus (UniProt Q16082). Those annotations support checking compartment, but do not establish antigen-retrieval or fixation sensitivity (UniProt Q16082).
Which sampled cells make useful low-signal comparisons?	HPA reports no detection in appendix glandular cells and breast adipocytes, and low staining in several other named cell populations (HPA tissue IHC). Match the actual cell type before using any tissue as a comparison (HPA tissue IHC; general IHC practice).
IF/ICC Q&A: Should Golgi signal be expected on this IHC slide?	HPA reports mainly Golgi localization, with additional nucleoplasm, in ICC-IF images; UniProt also reports cytoplasm and nuclear foci (HPA subcellular; UniProt Q16082). For paraffin IHC, judge against HPA's tissue-level cytoplasmic pattern; ICC-IF localization is a separate observation (HPA tissue IHC; HPA subcellular).

Why is my staining missing, weak or wrong?
Situation	Likely cause	Next action
The positive-control muscle section is blank.	The expected cells may be absent or the staining run may have failed; HPA reports medium staining in cardiomyocytes and skeletal myocytes (HPA tissue IHC; general IHC practice).	Confirm cell identity and section integrity, then review retrieval, antibody application and detection against the run controls (general IHC practice). Do not infer target-specific retrieval sensitivity from the HPA pattern (HPA tissue IHC).
Most cells and extracellular areas stain brown.	Nonspecific binding or detection background may obscure a cellular pattern (general IHC practice).	Compare a primary-omission control, review blocking and washes, and score only staining with identifiable cell boundaries and compartment (general IHC practice).
An expected low-signal cell population appears strongly positive.	Cell misidentification, cross-reactivity or endogenous enzyme activity may explain the discordance (general IHC practice; HPA tissue IHC).	Verify the cell type and compare primary-omission and detection controls; keep HPA's cell-specific no-detection calls and low RNA concordance in view (HPA tissue IHC; general IHC practice).
Signal seems confined to cell surfaces.	That distribution conflicts with UniProt's cytoplasm/nucleus annotation and absence of a transmembrane segment (UniProt Q16082).	Inspect morphology and counterstain, then compare the IHC-validated antibody's control pattern before assigning HSPB2 positivity (general IHC practice; HPA antibodies).
Only nuclei stain.	Nuclear localization is possible, but UniProt specifies nuclear foci and HPA's tissue summary emphasizes cytoplasm (UniProt Q16082; HPA tissue IHC).	Check whether staining is focal within identified cells, review background controls, and avoid calling uniform nuclear deposit a confirmed tissue pattern on that evidence alone (general IHC practice; HPA tissue IHC).
Reported medium-positive cells stain unevenly across a section.	Technical variation or differences among sampled cells may affect interpretation; the HPA entry supplies a reported level, not a per-cell acceptance threshold (HPA tissue IHC; general IHC practice).	Compare intact regions and run controls, record the affected cell population and distribution, and avoid upgrading patchy signal solely to match the HPA label (general IHC practice; HPA tissue IHC).

Source: UniProt Q16082 Human Protein Atlas tissue Human Protein Atlas subcellular

Experiment evidence

IHC & IF images showing HSPB2 staining

PA1802 · IHCAnti-HSPB2 antibody, PA1802, IHC(F) IHC(F): Rat Cardiac Muscle Tissue

IHC analysis of HSPB2 using anti-HSPB2 antibody (PA1802). HSPB2 was detected in a paraffin-embedded section of human heart 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-HSPB2 Antibody (PA1802) 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.

PA1802 · IHCIHC analysis of HSPB2 using anti-HSPB2 antibody (PA1802). HSPB2 was detected in a paraffin-embedded section of human heart tissue. Heat medi

PA1802 · IFAnti-HSPB2 antibody, PA1802, ICC ICC: HELA Cell

HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000170276-HSPB2/tissue/cerebral+cortex#imid_20994491

HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000170276-HSPB2/tissue/colon#imid_20994409

HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000170276-HSPB2/tissue/liver#imid_20994410

HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000170276-HSPB2/tissue/kidney#imid_20994403

HPA ICC-IF BJ [Human fibroblast] — HSPB2 (HPA079414)

HPA · ICC-IF BJ [Human fibroblast]Human Protein Atlas immunofluorescence, BJ [Human fibroblast], antibody HPA079414; green = HSPB2, blue = nucleus, red = microtubules.

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

Sample controls for HSPB2 IHC & IF

🧪Run heart muscle first: cardiomyocytes should stain at the HPA Medium level (HPA: heart muscle, cardiomyocytes, Medium). Use appendix glandular cells as the negative tissue (HPA: appendix, glandular cells, Not detected); on the heart slide, use cells outside the stained cardiomyocytes as an internal background reference only after confirming that they lack specific staining.

Positive control tissue: Heart muscle (Cardiomyocytes, HPA Medium)

Negative control tissue: Appendix (HPA Not detected)

ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show HSPB2 in BJ [Human fibroblast], U2OS, hTERT-RPE1, with annotated localisation: Golgi apparatus (approved) (HPA subcellular).

Technical controls: Include a no-primary (secondary-only) control, a rabbit IgG isotype control matched to the primary antibody’s clonality, and an HSPB2 knockout biological control where available (datasheet caption: rabbit anti-HSPB2 antibody). Quench endogenous peroxidase for chromogenic detection in heart sections and assess any residual signal against the no-primary slide (selected PA1802 caption: heart tissue; peroxidase secondary and DAB detection).

⚠️Feasibility: No target-specific fixation window or fixation effect is reported in the supplied evidence, and the selected PA1802 paraffin-section caption does not state a fixative (selected PA1802 caption: fixative not stated). The caption uses heat-mediated retrieval in EDTA at pH 8.0, but does not establish that HSPB2 staining depends on retrieval (selected PA1802 caption: EDTA retrieval, pH 8.0). The supplied evidence does not establish whether frozen sections or IF are easier; for heart IHC, assess tissue pigment and background against the negative controls (HPA: heart muscle, cardiomyocytes, Medium; selected PA1802 caption: heart tissue, DAB detection).

HPA tissue IHC evidence for HSPB2

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.

Positive expression · recommended positive controls

Tissue	Cell type	Level	Evidence	Source
Heart muscle	Cardiomyocytes	Medium	Protein (IHC)	HPA →
Kidney	Cells in tubules	Medium	Protein (IHC)	HPA →
Placenta	Decidual cells	Medium	Protein (IHC)	HPA →
Skeletal muscle	Myocytes	Medium	Protein (IHC)	HPA →

Undetected expression · recommended negative controls

Tissue	Cell type	Level	Evidence	Source
Appendix	Glandular cells	Not detected	Protein (IHC)	HPA →
Breast	Adipocytes	Not detected	Protein (IHC)	HPA →
Caudate	Neuronal cells	Not detected	Protein (IHC)	HPA →
Cerebellum	Cells in granular layer	Not detected	Protein (IHC)	HPA →
Cervix	Glandular cells	Not detected	Protein (IHC)	HPA →

Section 3

Advanced HSPB2 IHC Tips

Use the paraffin-section IHC result as a starting point, then check cell type, compartment and staining controls before interpreting HSPB2 signal.

Which retrieval condition should I start with for HSPB2 paraffin-section IHC?

Start with heat-mediated retrieval in EDTA at pH 8.0 (datasheet PA1802). The documented heart-section example used this condition before incubation with 2 μg/ml catalog antibody overnight at 4°C, but reports no retrieval time or fixative (datasheet PA1802). If staining is weak, adjust heating time on matched sections while keeping buffer and detection conditions constant, and compare signal with tissue morphology (standard IHC practice). Use heart muscle as a positive reference because cardiomyocytes show medium staining (HPA: heart muscle); record the final heating time so subsequent sections can be compared fairly (standard IHC practice).

How should I troubleshoot fixation-related loss of HSPB2 staining?

Target-specific sensitivity to fixation is unknown because the selected paraffin-section caption does not state a fixative (datasheet PA1802). Record the fixative, fixation duration and specimen thickness for each block, then compare sections processed under matched retrieval and detection conditions (standard IHC practice). Begin with EDTA at pH 8.0 and the documented 2 μg/ml primary incubation overnight at 4°C, so differences in staining can be assessed against a consistent starting condition (datasheet PA1802). Check morphology and a concurrently processed positive control before attributing a weak result to fixation; staining patterns alone do not establish fixation sensitivity (standard IHC practice).

Should HSPB2 staining be cytoplasmic or nuclear in IHC sections?

Assess cytoplasmic staining first in heart and skeletal muscle sections, where tissue IHC reports cytoplasmic expression and medium staining in cardiomyocytes and myocytes (HPA: tissue IHC). Nuclear staining is plausible because HSPB2 is annotated in the cytoplasm and nucleus, including nuclear foci (UniProt Q16082: subcellular location). Cell-imaging data additionally place it mainly at the Golgi apparatus and in the nucleoplasm, but those observations come from ICC/IF rather than the paraffin-section example (HPA: subcellular). Compare suspected nuclear or punctate DAB signal with the counterstain and matched controls; do not assign a compartment from diffuse pigment alone (standard IHC practice).

Could an isoform or masked epitope explain inconsistent HSPB2 staining?

The supplied record lists 0 isoforms and a single 1–182 chain, so an annotated alternative isoform does not explain differing section patterns (UniProt Q16082: processing and isoforms). It lists an sHSP domain at residues 55–163, with 0 glycosylation sites and 0 modified residues, but gives no antibody epitope (UniProt Q16082: domains and PTMs). Compare serial sections using the documented EDTA retrieval at pH 8.0 and consistent primary incubation before changing retrieval conditions (datasheet PA1802; standard IHC practice). If signal remains inconsistent, consult antibody epitope information when available and test specificity with appropriate controls; the supplied data cannot locate the recognized epitope (standard IHC practice).

How can IF help resolve ambiguous HSPB2 IHC localisation?

Use IF as a complementary localisation check, since cell-imaging data place HSPB2 mainly at the Golgi apparatus and additionally in the nucleoplasm (HPA: subcellular). Multiplex with a marker for the cell type under study, such as cardiomyocytes in heart or myocytes in skeletal muscle, and assess whether HSPB2 signal falls within those cells (HPA: tissue IHC; standard IF practice). Choose fluorophores after inspecting unstained tissue autofluorescence, and keep single-stain controls to assess channel bleed-through (standard IF practice). Because HSPB2 has no transmembrane segment and is annotated in cytoplasmic and nuclear compartments, use permeabilisation suitable for intracellular epitopes and verify that it preserves morphology (UniProt Q16082: topology and subcellular location; standard IF practice).

What should I check when HSPB2 DAB staining is diffuse?

The documented paraffin-section example used 10% goat serum blocking, 2 μg/ml primary antibody overnight at 4°C, and a peroxidase-conjugated secondary for 30 minutes at 37°C (datasheet PA1802). Review primary dilution, wash stringency and secondary-only controls when diffuse DAB obscures cellular boundaries (standard IHC practice). Include an endogenous peroxidase block and inspect a no-primary control, since enzyme activity can produce chromogen signal independently of target binding (standard chromogenic IHC practice). Compare suspect staining with cardiomyocytes or skeletal-muscle myocytes, which show medium HSPB2 staining, while checking whether pigment follows tissue folds, edges or damaged regions (HPA: tissue IHC; standard IHC practice).

How should I quantify HSPB2 staining across tissue sections? ⚠ ANSWER MARKED FOR VERIFICATION

Define the scored cell population and compartment before measuring, since heart cardiomyocytes and skeletal-muscle myocytes show medium staining while HSPB2 also has nuclear annotations (HPA: tissue IHC; UniProt Q16082: subcellular location). For chromogenic sections, report an H-score from intensity and percentage of positive cells, or report positive-cell percentage with the scoring threshold stated (standard IHC practice). Normalise counts to the number of eligible cells, or express positive-cell density per mm² of viable tissue when cell counting is impractical (standard IHC practice). Apply one staining threshold across matched batches and exclude folds, necrosis and edges from the measured area (standard IHC practice).

When is an apparent HSPB2-positive IHC result convincing?

A convincing result follows cellular boundaries in the expected population and is reproducible in matched sections; heart cardiomyocytes and skeletal-muscle myocytes are reported at medium intensity (HPA: tissue IHC; standard IHC practice). Cytoplasmic signal fits tissue IHC, while nuclear signal can fit the protein annotation and should be checked against the counterstain and controls (HPA: tissue IHC; UniProt Q16082: subcellular location; standard IHC practice). Treat staining confined to edges, folds or necrotic areas, or staining reproduced without primary antibody, as suspect (standard IHC practice). Interpret unexpected cell populations cautiously because the HPA tissue-IHC reliability description reports low consistency between antibody staining and RNA expression data (HPA: tissue IHC reliability).

Boster reagents

Best HSPB2 / Heat shock protein beta-2 IHC Antibodies

PA1802 has IHC images from human paraffin-embedded heart and rat frozen cardiac muscle, plus a HeLa ICC image; listed reactivity covers human, mouse and rat (catalog: image captions, reactivity).

Real IHC data

Anti-Heat shock protein beta-2 HSPB2 Antibody ®

Cat # PA1802

View product →

PA1802 will render with its human heart paraffin-section IHC figure (PA1802 IHC caption). The catalog also documents rat frozen cardiac muscle IHC and HeLa ICC; it lists human, mouse and rat reactivity (catalog: image captions, reactivity).

Which to pick: For tissue IHC, choose PA1802: its own figure documents paraffin-embedded human heart with EDTA retrieval at pH 8.0; the fixative is unreported (PA1802 IHC caption). For IF/ICC, PA1802 lists ICC and shows a HeLa ICC image, but its application list does not include IF; its host is rabbit and clonality is unreported (catalog: applications, ICC caption, host, clone). For cross-species work, PA1802 lists human, mouse and rat reactivity, with IHC images from human and rat tissue (catalog: reactivity, IHC captions).

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

References

UniProt Consortium. UniProt entry Q16082 (HSPB2_HUMAN, Heat shock protein beta-2).
Human Protein Atlas. HSPB2 tissue IHC expression (reliability: Approved).
Human Protein Atlas. HSPB2 subcellular location (ICC-IF): Mainly localized to the Golgi apparatus. In addition localized to the nucleoplasm..
Human Protein Atlas. HSPB2 antibody validation summary (1 antibodies).
Transcriptional profiling reveals H.pylori-associated genes induced inflammatory cell infiltration and chemoresistance in gastric cancer. Frontiers in immunology 2025 — PMC12162319.
PubMed PMID:9344664 — UniProt-cited evidence.
PubMed PMID:9490724 — UniProt-cited evidence.
PubMed PMID:15489334 — UniProt-cited evidence.