CD247 / T-cell surface glycoprotein CD3 zeta chain · IHC design guide

Design Immunohistochemistry for CD247

Plan chromogenic IHC for CD247 in paraffin sections using lymphoid tissue with documented immune-cell staining as a reference (HPA tissue IHC). This guide covers the membrane expectation (UniProt), fixation consistency (standard IHC practice) and interpretation of staining beyond T cells (UniProt).

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

Immunohistochemistry protocol sheet for CD247 (IHC for CD247): expected localisation Cell membrane expected; tissue compartment unreported (UniProt; HPA tissue IHC), antibody M02421, validated IHC image, and IHC protocol steps — Printable **CD247** IHC protocol sheet — expected localisation Cell membrane expected; tissue compartment unreported (UniProt; HPA tissue IHC), antibody M02421, controls and protocol steps. Open the full CD247 IHC guide →

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CD247 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	Cell membrane expected; tissue compartment unreported (UniProt; HPA tissue IHC)
	Staining pattern	Selective immune-cell staining; compartment unreported (HPA tissue IHC)
	Antigen retrieval	EDTA pH 8.0 HIER, heat-mediated (datasheet M02421)
	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 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 M02421)
	Caveat	CD247 also participates in Fc receptor complexes (UniProt)
	Regulation	TCR engagement phosphorylates ITAMs (UniProt)
	Isoform / epitope	3 isoforms; check extracellular vs cytoplasmic epitope (UniProt)

Section 1

Recommended CD247 IHC & IF Protocols

The catalog antibody’s IHC-P protocol (datasheet M02421) appears alongside three published CD247 IHC protocols (PMC6940041; PMC12638995; PMC10683602).

Recommended immunohistochemistry (IHC-P) protocol parameters
Sample	Paraffin-embedded human prostate cancer tissue; fixative not specified (datasheet M02421)
Fixation	Image fixative and duration unreported (datasheet M02421); 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 M02421); 20 min, 95–100 °C (standard)
Peroxidase block	3% H2O2, 10 min, room temperature (standard)
Blocking	10% goat serum (datasheet M02421)
Primary antibody	Rabbit monoclonal (clone IHI-3) anti-CD247, 1:50 (datasheet M02421)
Primary incubation	Overnight at 4 °C (datasheet M02421)
Detection	HRP-conjugated secondary, DAB chromogen (datasheet M02421)
Counterstain	Hematoxylin, blue, dehydrate and mount (standard)
Expected result	CD247-positive staining in lymphoid tissue of appendix (HPA tissue IHC: High). HPA tissue profile: Selective expression in immune cells. No signal in the no-primary control.

💡Decision noteStart with heat-mediated EDTA retrieval at pH 8.0 (datasheet M02421); a published skin-tissue protocol also uses high-pressure EDTA at pH 8.0 (PMC12638995).

Section 2

What Is the Expected CD247 Staining Pattern?

CD247 is a cell-membrane component of the T-cell receptor complex, with a short extracellular region and a long cytoplasmic tail (UniProt P20963 topology and function). In paraffin-section IHC, expect staining in immune-cell populations within lymphoid tissue and scattered tissue lymphocytes (HPA: selective immune-cell expression; UniProt P20963 tissue specificity). HPA rates its tissue IHC pattern Enhanced, citing consistency between antibody staining and RNA expression (HPA: tissue IHC reliability).

What am I looking at on my slide?
Membrane-associated staining in lymphoid cells, with stronger signal in appendix, lymph node, spleen or tonsil.	This fits CD247 membrane localisation (UniProt P20963 topology). HPA reports High staining in appendix lymphoid tissue, lymph-node germinal center cells, splenic red-pulp cells and tonsillar non-germinal center cells (HPA: tissue IHC). These are tissue and cell-group annotations; they do not identify every stained cell as a T cell.
Predominantly nuclear staining, especially where a membrane-associated pattern cannot be found.	A nuclear-dominant pattern conflicts with the reported cell-membrane localisation (UniProt P20963 subcellular location; HPA: ICC-IF membrane summary). Check the distribution against lymphoid cells and controls before interpreting it as CD247; nonspecific staining or detection artefact is possible (general IHC practice).
Broad staining of adipocytes, respiratory epithelium or other cells outside the expected immune-cell pattern.	HPA reports CD247 as Not detected in adipocytes of adipose tissue and respiratory epithelial cells of bronchus (HPA: tissue IHC). Review adjacent immune cells separately; broad staining of those annotated negative cells raises concern for cross-reactivity or endogenous detection activity (general IHC practice).
Uniform haze or chromogen deposits obscure cell borders across positive and negative areas.	Diffuse background cannot establish CD247 localisation or cell identity (general IHC practice). If annotated negative cells also appear stained, compare the slide with detection-only and tissue controls before scoring; HPA's selective immune-cell pattern is the reference for that comparison (HPA: tissue IHC).
No convincing signal in lymphoid tissue expected to contain positive cells.	An all-negative result needs a technical check before a biological interpretation (general IHC practice). HPA reports High staining in specified appendix, lymph-node, spleen and tonsil cell groups, but those annotations do not guarantee that every section or every cell is positive (HPA: tissue IHC).

💡Expected CD247 appearanceCall the result positive when immune cells show convincing membrane-associated chromogenic staining, potentially strong in HPA High lymphoid cell groups; nuclear-dominant or broad staining of annotated negative cells argues against a specific CD247 pattern (UniProt P20963 topology; HPA: tissue IHC).

How each factor affects the staining
Epitope position and retrieval	CD247 spans residues 31–51; residues 22–30 are extracellular and 52–164 cytoplasmic (UniProt P20963 topology). Interpret an antibody's staining with its mapped epitope and follow its IHC-P retrieval instructions when available (general IHC practice). Epitope access or retrieval sensitivity for this target is not established by the supplied HPA and UniProt records.
Choice of positive and comparison tissue	Appendix lymphoid tissue, lymph-node germinal center cells, splenic red-pulp cells and tonsillar non-germinal center cells are High; bone-marrow hematopoietic cells and endometrial lymphocytes are Medium (HPA: tissue IHC). Compare the relevant cell groups, since these levels describe annotated populations rather than every cell in a section.
Molecular forms and phosphorylation	UniProt lists three isoforms, a signal peptide at residues 1–21, and several cytoplasmic phosphorylation sites (UniProt P20963 isoforms, processing and modified residues). Without the antibody epitope and phospho-specificity, these facts do not predict distinct IHC patterns or explain a negative slide.
Antibody evidence	Two listed antibodies, HPA008750 and CAB004651, have Enhanced IHC validation; neither has an ICC validation status in the supplied antibody list (HPA: antibodies). Enhanced supports the reported tissue IHC pattern, while a new antibody or assay still needs its own controls (general IHC practice).
IF/ICC Q&A: what localisation should be expected?	Expect membrane-associated CD247 based on UniProt and HPA's membrane summary (UniProt P20963 subcellular location; HPA: ICC-IF summary). The supplied HPA record has no ICC-IF image cell lines or main-location assignment, and the listed antibodies have no ICC validation status (HPA: subcellular record; HPA: antibodies).

Why is my staining missing, weak or wrong?
Situation	Likely cause	Next action
Lymphoid control is blank.	The staining run or detection may have failed; HPA reports High signal in specified lymphoid cell groups (HPA: tissue IHC; general IHC practice).	Confirm that the section includes the annotated cell group, then review the antibody's IHC-P instructions, retrieval, dilution and detection controls (general IHC practice).
Signal is mainly nuclear.	That compartment disagrees with CD247 membrane localisation (UniProt P20963 subcellular location). Nonspecific staining remains possible (general IHC practice).	Compare positive and negative cell groups at higher magnification, and check a detection-only control before assigning CD247 positivity (HPA: tissue IHC; general IHC practice).
Adipocytes or bronchial epithelium stain broadly.	Those cell groups are annotated Not detected (HPA: tissue IHC); cross-reactivity or endogenous detection activity may contribute (general IHC practice).	Separate nearby immune-cell staining from the annotated negative cells; check detection-only controls and adjust blocking or detection conditions if background persists (general IHC practice).
Chromogen haze makes cell outlines hard to score.	Diffuse background can result from excessive reagent signal or inadequate blocking (general IHC practice); it does not establish the membrane pattern reported for CD247 (UniProt P20963; HPA: ICC-IF summary).	Review the catalog antibody's IHC-P dilution and detection instructions, then compare a detection-only control and an HPA-annotated negative cell group (general IHC practice; HPA: tissue IHC).
Positive and negative areas look equally stained.	A flat pattern conflicts with HPA's selective immune-cell expression and its Not detected annotations for several nonimmune cell groups (HPA: tissue IHC).	Score cell groups separately, verify control performance and reassess nonspecific background before calling all tissue positive (HPA: tissue IHC; general IHC practice).
A dim result appears in bone marrow or endometrial lymphocytes.	These populations are reported at Medium, whereas several listed lymphoid populations are High (HPA: tissue IHC); intensity alone cannot show that the assay failed.	Compare an HPA High cell group in the same run and judge the expected compartment and cell identity before changing staining conditions (HPA: tissue IHC; UniProt P20963 topology; general IHC practice).

Source: UniProt P20963 Human Protein Atlas tissue Human Protein Atlas subcellular

Experiment evidence

IHC & IF images showing CD247 staining

IHC analysis of CD3Z using anti-CD3Z antibody (M02421). CD3Z was detected in a paraffin-embedded section of human prostate cancer 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 1:50 rabbit anti-CD3Z Antibody (M02421) 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.

M02421 · IHCIHC analysis of CD3Z using anti-CD3Z antibody (M02421). CD3Z was detected in a paraffin-embedded section of human prostate cancer tissue. He

HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000198821-CD247/tissue/cerebral+cortex#imid_3077928

HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000198821-CD247/tissue/colon#imid_3077862

HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000198821-CD247/tissue/liver#imid_3077863

HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000198821-CD247/tissue/kidney#imid_3077856

← swipe / scroll for more images →

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

Sample controls for CD247 IHC & IF

🧪Run tonsil first: non-germinal center cells should stain (HPA: High in tonsil non-germinal center cells). Use bronchus as the negative tissue: respiratory epithelial cells are not detected (HPA: Not detected in bronchus respiratory epithelial cells); epithelial cells within the tonsil section should lack specific CD247 signal (UniProt P20963: T-cell surface protein).

Positive control tissue: Appendix (Lymphoid tissue, HPA High)

Negative control tissue: Adipose tissue (HPA Not detected)

ICC-IF cell lines (HPA subcellular resource): HPA carries no ICC-IF cell line for CD247; derive a cell-line control from the positive tissue's cell type (Lymphoid tissue) and confirm it by RNA or western blot first.

Technical controls: Include no-primary (secondary-only) and host- and class-matched rabbit isotype controls (M02421 caption: rabbit primary antibody). Use CD247 knockout material as a biological negative; quench endogenous peroxidase in tonsil before chromogenic detection (HPA: tonsil non-germinal center cells High; M02421 caption: HRP/DAB detection).

⚠️Feasibility: A target-specific fixation window or fixation effect is unreported, and the exact M02421 tissue-IHC caption does not state a fixative (M02421 caption). The paraffin-section example uses heat retrieval in EDTA at pH 8.0, but whether retrieval is required is unreported (M02421 caption). Is frozen-section staining or IF/ICC easier? The supplied evidence does not establish either; tonsil peroxidase background warrants attention with HRP/DAB detection (HPA: tonsil non-germinal center cells High; M02421 caption: HRP/DAB detection).

HPA tissue IHC evidence for CD247

Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Enhanced — High consistency between antibody staining and RNA expression data. Antibody staining in cells/structures not annotated, view images.). 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	Lymphoid tissue	High	Protein (IHC)	HPA →
Lymph node	Germinal center cells	High	Protein (IHC)	HPA →
Spleen	Cells in red pulp	High	Protein (IHC)	HPA →
Tonsil	Non-germinal center cells	High	Protein (IHC)	HPA →
Bone marrow	Hematopoietic cells	Medium	Protein (IHC)	HPA →

Undetected expression · recommended negative controls

Tissue	Cell type	Level	Evidence	Source
Adipose tissue	Adipocytes	Not detected	Protein (IHC)	HPA →
Adrenal gland	Glandular cells	Not detected	Protein (IHC)	HPA →
Breast	Adipocytes	Not detected	Protein (IHC)	HPA →
Bronchus	Respiratory epithelial cells	Not detected	Protein (IHC)	HPA →
Caudate	Glial cells	Not detected	Protein (IHC)	HPA →

Section 3

Advanced CD247 IHC Tips

Use compartment, cell identity, and controlled staining conditions to troubleshoot CD247 chromogenic IHC; treat IF as a separate application.

What should I change when CD247 staining is weak after retrieval?

Start with heat-mediated retrieval in EDTA at pH 8.0 (datasheet M02421). The selected paraffin-section image used this retrieval before 1:50 primary antibody incubation overnight at 4°C (datasheet M02421). Check a lymphoid positive control alongside the test section, then adjust heating or cooling consistently across sections if staining remains weak (standard IHC practice; HPA: high in appendix lymphoid tissue). If trying another buffer or pH as a fallback, compare it directly against EDTA pH 8.0 on adjacent sections rather than attributing any change to antigen abundance (standard IHC practice).

Could fixation explain weak CD247 staining in paraffin sections?

The selected tissue image reports a paraffin-embedded section but does not state its fixative, so target-specific fixation sensitivity is unknown (datasheet M02421). Record the specimen fixative and fixation duration, and compare sections processed with the same retrieval and detection conditions (standard IHC practice). Include a known lymphoid positive control in each run to distinguish a specimen-processing problem from a failed staining run (HPA: high in appendix lymphoid tissue; standard IHC practice). If staining differs across processing batches, assess morphology and retrieval first; neither tissue expression patterns nor CD247 topology establishes a particular fixation effect (standard IHC practice; UniProt P20963 topology).

Should CD247 appear at the cell surface or within the cytoplasm?

Expect staining associated with immune-cell membranes because CD247 is a cell-membrane component of the TCR-CD3 complex (UniProt P20963: subcellular location and function; HPA: selective expression in immune cells). Its extracellular segment spans residues 22–30, its membrane segment 31–51, and its cytoplasmic region 52–164 (UniProt P20963 topology). A cytoplasmic-side epitope can produce peripheral or adjacent cytoplasmic signal in a thin section, so interpret apparent location with section thickness and counterstain in mind (UniProt P20963 topology; standard IHC practice). Treat isolated nuclear staining or diffuse staining of unrelated tissue cells as a specificity question requiring controls, rather than as established CD247 localisation (UniProt P20963: cell membrane; standard IHC practice).

How do epitope placement and isoforms affect CD247 IHC interpretation?

CD247 has 3 annotated isoforms, but the supplied image caption does not identify the antibody epitope or establish which isoforms it detects (UniProt P20963: isoforms; datasheet M02421). Ask for an epitope map before making isoform-specific claims, and compare the mapped sequence with the isoforms (standard IHC practice). The cytoplasmic region contains 3 ITAMs and reported phosphorylation sites, so epitope location and modification state may matter when interpreting differential staining (UniProt P20963: topology, ITAMs, modified residues). A change in chromogenic signal alone cannot distinguish isoform abundance, epitope accessibility, and cell abundance; evaluate morphology and an independent immune-cell marker (standard IHC practice).

How should I investigate a CD247 IF result alongside this IHC assay?

Treat IF as a separate application: the selected evidence documents paraffin-section chromogenic IHC, while the supplied HPA subcellular record lists no ICC/IF images (datasheet M02421; HPA: subcellular record). For multiplex IF, pair CD247 with an independently validated T-cell marker and inspect cell-level overlap rather than assuming every CD247-positive cell is a T cell (UniProt P20963: TCR-CD3 and Fc-receptor-complex roles; standard IF practice). Choose fluorophores after measuring tissue autofluorescence in an unstained section, and include single-label controls for channel bleed-through (standard IF practice). If the antibody epitope maps to residues 52–164, evaluate permeabilisation because that region faces the cytoplasm; an extracellular epitope at 22–30 calls for a separate accessibility assessment (UniProt P20963 topology; standard IF practice).

How can I reduce diffuse brown staining without losing CD247-positive cells?

First inspect a no-primary control and a lymphoid positive control to separate detection background from a weak CD247 signal (standard IHC practice; HPA: high in appendix lymphoid tissue). The selected image used 10% goat serum block, 1:50 primary antibody overnight at 4°C, and a peroxidase-linked secondary for 30 minutes at 37°C (datasheet M02421). Include an endogenous peroxidase block before DAB development and compare chromogen development consistently across slides (standard chromogenic IHC practice). If diffuse staining persists, adjust blocking, washing, or antibody concentration one variable at a time while retaining the positive control (standard IHC practice).

What is a defensible way to score CD247 staining across sections? ⚠ ANSWER MARKED FOR VERIFICATION

Define the compartment and cell population before scoring, because CD247 is membrane-associated and tissue staining is selective for immune cells (UniProt P20963: subcellular location; HPA: tissue profile). For a defined region, report the percentage of positive immune cells and an intensity-stratified H-score from 0–300, with thresholds fixed before comparing groups (standard IHC scoring practice). Where cell infiltration is the question, count positive cells per mm² of viable tissue and normalise to viable area or total immune-cell count, as appropriate (standard IHC quantification practice). Exclude folds, edges, and necrotic areas using the same rules across sections, and report the control-based positivity threshold (standard IHC practice).

When is a brown CD247 signal likely to be artefactual?

A credible result places signal in appropriate immune cells with membrane-associated localisation and reproduces in a positive lymphoid control (HPA: selective immune-cell expression and high appendix lymphoid staining; UniProt P20963: cell membrane; standard IHC practice). Scrutinise strong staining confined to nuclei or unrelated tissue cells because that pattern conflicts with the recorded localisation and tissue profile (UniProt P20963: cell membrane; HPA: tissue profile). Check whether staining tracks section edges, folds, or necrosis, and compare a no-primary slide for endogenous enzyme or detection background (standard chromogenic IHC practice). CD247 also participates in an Fc-receptor complex, so cell identity should be confirmed with morphology and a suitable companion marker before calling every positive cell a T cell (UniProt P20963: subunit and function; standard IHC practice).

Boster reagents

Best CD247 / T-cell surface glycoprotein CD3 zeta chain IHC Antibodies

Two anti-CD247 antibodies list IHC and IF/ICC applications (catalog applications); only M02421 has supplied IHC images, showing human prostate cancer and lymphoma paraffin sections (M02421 IHC captions).

Real IHC data

Anti-CD3 zeta CD247 Rabbit Monoclonal Antibody

Cat # M02421

View product →

M02421 lists human reactivity and IHC/IF/ICC applications (M02421 catalog); its IHC captions document staining of human prostate cancer and lymphoma paraffin sections (M02421 IHC captions). P02421 lists IHC/IF/ICC applications and human, monkey, mouse, and rat reactivity, but has no supplied specimen image (P02421 catalog images and applications).

Which to pick: For tissue IHC, choose monoclonal M02421 when a documented paraffin section example matters: its caption specifies EDTA retrieval at pH 8.0 and a 1:50 primary dilution; the fixative is unreported (M02421 IHC caption; M02421 catalog clone). For human IF/ICC, M02421 lists both applications and a 1:50 IF dilution, although no IF image is supplied (M02421 catalog applications, dilution and images). For work involving monkey, mouse, or rat, consider polyclonal P02421 because those species and IF/ICC and IHC applications are listed; no IHC or IF image is supplied for it (P02421 catalog reactivity, applications, clone and images).

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

References

UniProt Consortium. UniProt entry P20963 (CD3Z_HUMAN, T-cell surface glycoprotein CD3 zeta chain).
Human Protein Atlas. CD247 tissue IHC expression (reliability: Enhanced).
Human Protein Atlas. CD247 subcellular location (ICC-IF): Membrane.
Human Protein Atlas. CD247 antibody validation summary (2 antibodies).
CD247 expression is associated with differentiation and classification in ovarian cancer. Medicine 2019 — PMC6940041.
Integration of intragraft transcriptomics and urinary cytokines identifies CXCL10 and FasL signature in subclinical acute rejection. Scientific reports 2026 — PMC13018632.
Immune genes CD247 STAT1 and LCK mediate host-pathogen interactions in sporotrichosis. Scientific reports 2025 — PMC12638995.
Characterization of the immune cell function landscape in head and neck squamous carcinoma to assist in prognosis prediction and immunotherapy. Aging 2023 — PMC10683602.
PubMed PMID:2974162 — UniProt-cited evidence.
PubMed PMID:14702039 — UniProt-cited evidence.
PubMed PMID:16710414 — UniProt-cited evidence.