ZC3H12C / Probable ribonuclease ZC3H12C · IHC design guide

Design Immunohistochemistry for ZC3H12C

Plan paraffin-section IHC for ZC3H12C using the catalog antibody at a starting concentration of 5 μg/mL (datasheet). Compare cytoplasmic staining in respiratory epithelial cells (HPA tissue IHC), while accounting for low consistency 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 ZC3H12C (IHC for ZC3H12C): expected localisation Cytoplasmic staining in tissue (HPA tissue IHC), antibody A13406, validated IHC image, and IHC protocol steps — Printable **ZC3H12C** IHC protocol sheet — expected localisation Cytoplasmic staining in tissue (HPA tissue IHC), antibody A13406, controls and protocol steps. Open the full ZC3H12C IHC guide →

Navigate to: Protocols Staining pattern Controls Antibodies

ZC3H12C 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 staining in tissue (HPA tissue IHC)
	Staining pattern	Respiratory epithelial cells show high cytoplasmic staining (HPA tissue IHC)
	Antigen retrieval	Citrate pH 6.0 HIER, 95–98 °C, 20 min (rule: cytoplasmic / membrane antigen)
	Positive control ⓘ	Bronchus+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 conditions consistent across sections. (standard IHC practice; not target-specific)
	Caveat	Staining has low consistency with RNA expression (HPA tissue IHC)
	Regulation	Expression regulation is unreported (UniProt)
	Isoform / epitope	2 isoforms; verify antibody epitope coverage (UniProt)

Section 1

Recommended ZC3H12C IHC & IF Protocols

The catalog antibody’s IHC-P protocol is accompanied by one published ZC3H12C IHC method using paraffin sections (PMC10809481).

Recommended immunohistochemistry (IHC-P) protocol parameters
Sample	Tissue sections; selected-image fixative not specified (standard IHC workflow)
Fixation	Image fixative and duration unreported (datasheet A13406); verify before use.
Sectioning	4–5 µm sections on charged slides (standard)
Deparaffinisation	Xylene, graded ethanol series to water (standard)
Antigen retrieval	Heat-induced epitope retrieval in citrate buffer, pH 6.0, 20 min at 95–98 °C (standard rule: cytoplasmic / membrane antigen)
Peroxidase block	3% H2O2, 10 min, room temperature (standard)
Blocking	10% normal serum of the secondary host, 30 min, room temperature (standard)
Primary antibody	Rabbit anti-ZC3H12C, 5 μg/mL (datasheet A13406)
Primary incubation	Overnight at 4 °C (standard)
Detection	HRP-polymer secondary, DAB chromogen 5–10 min (standard)
Counterstain	Hematoxylin, blue, dehydrate and mount (standard)
Expected result	ZC3H12C-positive staining in respiratory epithelial cells of bronchus (HPA tissue IHC: High). HPA tissue profile: Ubiquitous cytoplasmic expression, most abundant in thyroid gland. No signal in the no-primary control.

💡Decision noteStart with citrate pH 6.0 HIER at 95–98 °C for 20 min (page antigen retrieval); the published method does not specify retrieval (PMC10809481).

Section 2

What Is the Expected ZC3H12C Staining Pattern?

For paraffin-section IHC, expect ZC3H12C staining mainly in the cytoplasm, with high staining in bronchial and nasopharyngeal respiratory epithelial cells (HPA: tissue IHC). HPA describes the tissue pattern as ubiquitous and most abundant in thyroid gland, but rates its reliability Approved with low consistency against RNA expression data and pending external verification (HPA: tissue IHC). ZC3H12C has no annotated transmembrane segment (UniProt Q9C0D7 topology).

What am I looking at on my slide?
Clear cytoplasmic staining in respiratory epithelial cells, with limited background in surrounding tissue (HPA: High in bronchus and nasopharynx).	This matches the strongest cell-specific examples supplied for tissue IHC (HPA: tissue IHC). Compare the positive cells with adjacent structures on the same slide; a dark deposit without identifiable cellular boundaries is less persuasive (general IHC interpretation).
Predominantly nuclear, membranous, or punctate staining replaces the expected cytoplasmic tissue pattern (HPA: tissue IHC).	Treat a compartment mismatch as possible artefact and check control sections and detection background (general IHC practice). Nuclear membrane and Golgi localisation comes from ICC-IF, so that result alone does not establish the expected paraffin-section pattern (HPA: subcellular ICC-IF).
Strong deposit appears in adipocytes, cardiomyocytes, or alveolar cells (HPA: Not detected in those cells).	Unexpected staining can reflect cross-reactivity or endogenous detection activity; assess whether it follows cellular contours or occurs across unrelated structures (general IHC practice). An HPA 'Not detected' call is a reference observation, not proof that every specimen must be negative (HPA: tissue IHC).
Pale, widespread chromogen obscures tissue structure and the expected positive cells (general IHC observation).	Diffuse background weakens the interpretation of any cytoplasmic signal (general IHC practice). Evaluate a no-primary control, blocking, antibody concentration, and chromogen development before assigning the deposit to ZC3H12C (general IHC practice).
No epithelial signal is visible in bronchus or nasopharynx (HPA: High in respiratory epithelial cells).	First consider an assay failure and inspect section quality, retrieval, antibody incubation, and detection controls (general IHC practice). HPA's Approved rating carries low RNA-staining consistency, so one negative section cannot independently settle target absence (HPA: tissue IHC reliability).

💡Expected ZC3H12C appearanceCall a section positive when distinct cytoplasmic chromogen marks respiratory epithelial cells at appreciable intensity (HPA: High in bronchus and nasopharynx; cytoplasmic tissue profile); broad haze or equally strong staining in HPA 'Not detected' cells is suspect (HPA: tissue IHC; general IHC interpretation).

How each factor affects the staining
Tissue IHC reference and confidence	HPA reports ubiquitous cytoplasmic staining, greatest abundance in thyroid gland, and low tissue RNA specificity (HPA: tissue IHC). Its Approved label includes low antibody-staining versus RNA consistency and pending external verification; interpret unusual results with controls rather than treating the atlas pattern as definitive (HPA: reliability; general IHC practice).
Choice of comparison cells	Bronchial or nasopharyngeal respiratory epithelial cells provide High-staining comparisons; adipocytes, cardiomyocytes, and alveolar cells are listed as Not detected (HPA: tissue IHC). Compare the named cell populations, since 'lung alveolar cells' and 'bronchus respiratory epithelial cells' are different atlas observations (HPA: tissue IHC).
Antibody evidence	HPA038836 and HPA038837 each have Approved IHC status; the supplied records do not assign either an Enhanced IHC status (HPA: antibody records). Approval supports using the atlas images as a comparison, while the stated RNA-staining inconsistency still limits how confidently an unexpected deposit identifies ZC3H12C (HPA: tissue IHC reliability).
IF/ICC expectation?	HPA reports approved nuclear membrane and Golgi localisation in ICC-IF images from A-431, U-251MG, and U2OS (HPA: subcellular ICC-IF). Those cultured-cell observations answer the IF/ICC localisation question; use the cytoplasmic tissue profile to judge paraffin-section IHC (HPA: tissue IHC).
Protein features	UniProt lists two isoforms, one 1–883 chain, no signal peptide, no propeptide, and no transmembrane segment (UniProt Q9C0D7). These annotations do not identify the antibody epitope or establish isoform-specific staining, shedding, or a target-specific antigen-retrieval requirement (UniProt Q9C0D7; supplied antibody records).

Why is my staining missing, weak or wrong?
Situation	Likely cause	Next action
Expected respiratory epithelial cells are blank (HPA: High in bronchus and nasopharynx).	Weak or failed staining may arise at retrieval, antibody incubation, or detection steps (general IHC practice); target-specific fixation sensitivity is unreported in the supplied evidence.	Check a known-positive section in the same run, confirm the catalog antibody's IHC-P instructions, and verify chromogen and counterstain performance (general IHC practice). Interpret a single blank specimen cautiously given HPA's low RNA-staining consistency (HPA: reliability).
Signal is mainly nuclear or outlines cell surfaces in paraffin sections (HPA: cytoplasmic tissue IHC).	The compartment differs from the tissue reference; nonspecific deposit or misidentified cellular borders is possible (general IHC interpretation). ICC-IF nuclear membrane and Golgi localisation does not resolve an IHC discrepancy (HPA: subcellular ICC-IF).	Review morphology at higher magnification and compare matched controls and another HPA-positive cell population (general IHC practice; HPA: tissue IHC). Avoid calling the compartment ZC3H12C-specific from location alone.
Adipocytes, cardiomyocytes, or alveolar cells stain as strongly as expected positive epithelium (HPA: tissue IHC).	Those named populations are Not detected in the supplied HPA observations; cross-reactivity or endogenous detection activity is possible (HPA: tissue IHC; general IHC practice).	Run a no-primary control and assess blocking and detection chemistry (general IHC practice). Record the unexpected staining by cell type rather than labeling the entire tissue positive (general IHC scoring practice).
Chromogen is diffuse across cells and extracellular spaces (general IHC observation).	Excess primary antibody, insufficient blocking or washing, or prolonged chromogen development can raise background (general IHC practice). The pattern is difficult to reconcile with distinct cytoplasmic cell staining (HPA: tissue IHC).	Compare a no-primary control; then adjust blocking, washing, antibody concentration, or development time using the validated IHC-P workflow (general IHC practice). Score only cellular signal that remains distinguishable from background.
Thyroid staining differs from respiratory epithelium (HPA: thyroid most abundant; respiratory epithelium High).	HPA's thyroid statement is a tissue-level summary, while its supplied respiratory entries identify a particular cell type (HPA: tissue IHC). Differences in specimen and cell composition can complicate a direct intensity comparison (general IHC interpretation).	Describe the stained thyroid structures and compare like cell populations within each section (general IHC scoring practice). Do not infer a thyroid cell-specific expectation from the supplied HPA summary.
ICC-IF images show nuclear membrane or Golgi signal while the IHC section looks cytoplasmic (HPA: subcellular ICC-IF; tissue IHC).	The supplied HPA observations come from different assay formats and sample contexts; neither result alone proves that the other is erroneous (HPA: subcellular ICC-IF; tissue IHC).	Use the corresponding HPA assay reference for each interpretation and document the discrepancy (HPA: tissue IHC; subcellular ICC-IF). For IHC scoring, retain the named tissue and cell comparisons and assess staining specificity with controls (general IHC practice).

Source: UniProt Q9C0D7 Human Protein Atlas tissue Human Protein Atlas subcellular

Experiment evidence

IHC & IF images showing ZC3H12C staining

A13406 · IHCImmunohistochemistry of ZC3H12C in human brain tissue with ZC3H12C antibody at 5 μg/mL.

A13406 · IFImmunofluorescence of ZC3H12C in human brain tissue with ZC3H12C antibody at 20 μg/mL.

HPA · Cerebral cortexHuman Protein Atlas IHC, Cerebral cortex. Source: https://www.proteinatlas.org/ENSG00000149289-ZC3H12C/tissue/cerebral+cortex#imid_10099671

HPA · ColonHuman Protein Atlas IHC, Colon. Source: https://www.proteinatlas.org/ENSG00000149289-ZC3H12C/tissue/colon#imid_10099589

HPA · LiverHuman Protein Atlas IHC, Liver. Source: https://www.proteinatlas.org/ENSG00000149289-ZC3H12C/tissue/liver#imid_10099582

HPA · KidneyHuman Protein Atlas IHC, Kidney. Source: https://www.proteinatlas.org/ENSG00000149289-ZC3H12C/tissue/kidney#imid_10099583

HPA · ICC-IF A-431Human Protein Atlas immunofluorescence, A-431, antibody HPA038837; green = ZC3H12C, blue = nucleus, red = microtubules.

← swipe / scroll for more images →

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

Sample controls for ZC3H12C IHC & IF

🧪Run bronchus first: respiratory epithelial cells should stain strongly (HPA: High in bronchus respiratory epithelial cells). Use adipose tissue as the negative, with adipocytes expected to lack detectable staining (HPA: Not detected in adipocytes); on the bronchus slide, cells without specific signal should remain at background, although HPA does not identify a particular internal-negative cell type (HPA: bronchus row).

Positive control tissue: Bronchus (Respiratory epithelial cells, HPA High)

Negative control tissue: Adipose tissue (HPA Not detected)

ICC-IF cell lines (HPA subcellular resource): HPA ICC-IF images show ZC3H12C in A-431, U-251MG, U2OS, with annotated localisation: Nuclear membrane (approved), Golgi apparatus (approved) (HPA subcellular).

Technical controls: Include a no-primary (secondary-only) slide, an isotype control matched to the primary antibody’s host and immunoglobulin class, and a biological specificity control using knockout material or peptide blocking when appropriate. Quench endogenous peroxidase for chromogenic IHC and inspect bronchial mucus for trapped stain; if using IF, assess epithelial autofluorescence with an unstained section (standard IHC/IF practice).

⚠️Feasibility: A target-specific fixation window and the effect of antigen retrieval are unreported in the supplied evidence; compare retrieval conditions on matched paraffin sections (supplied evidence; standard IHC practice). The selected A13406 brain-tissue IHC caption does not state a fixative (A13406 caption: fixative not stated). The evidence does not establish that frozen sections or IF/ICC are easier; bronchial mucus can retain chromogen and complicate scoring (standard IHC practice).

HPA tissue IHC evidence for ZC3H12C

Comprehensive Human Protein Atlas IHC scoring per tissue (reliability: Approved — Low consistency between antibody staining and RNA expression data. Pending external verification.). 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
Bronchus	Respiratory epithelial cells	High	Protein (IHC)	HPA →
Nasopharynx	Respiratory epithelial cells	High	Protein (IHC)	HPA →
Adrenal gland	Glandular cells	Medium	Protein (IHC)	HPA →
Breast	Glandular cells	Medium	Protein (IHC)	HPA →
Caudate	Neuronal cells	Medium	Protein (IHC)	HPA →

Undetected expression · recommended negative controls

Tissue	Cell type	Level	Evidence	Source
Adipose tissue	Adipocytes	Not detected	Protein (IHC)	HPA →
Appendix	Glandular cells	Not detected	Protein (IHC)	HPA →
Heart muscle	Cardiomyocytes	Not detected	Protein (IHC)	HPA →
Lung	Alveolar cells	Not detected	Protein (IHC)	HPA →
Ovary	Ovarian stroma cells	Not detected	Protein (IHC)	HPA →

Section 3

Advanced ZC3H12C IHC Tips

Troubleshoot ZC3H12C staining in paraffin sections by checking retrieval, compartment, cell identity and controls before comparing chromogenic signal across samples.

How should I retrieve ZC3H12C in paraffin sections when staining is weak?

Start with citrate buffer at pH 6.0, heated to 95–98 °C for 20 min (page retrieval specification). Allow slides to cool in buffer, then compare the same tissue with and without retrieval while holding antibody concentration and detection conditions constant (standard IHC practice). If staining remains weak, test a second retrieval condition on adjacent sections as a fallback, recording its buffer, pH and heating time; no alternative has target-specific support here (page retrieval specification). Check both intensity and preserved cell morphology, because stronger staining alone does not establish ZC3H12C specificity (standard IHC practice).

Could fixation explain weak or uneven ZC3H12C staining in my paraffin sections?

Target-specific fixation sensitivity is unknown: the catalog antibody’s human brain tissue caption reports 5 µg/mL but does not state a fixative (A13406 tissue-IHC caption). Record the actual fixative and fixation interval for each specimen, then compare matched sections processed with the same citrate pH 6.0, 95–98 °C, 20 min retrieval (page retrieval specification; standard IHC practice). Examine whether loss of signal tracks processing batches or extends across morphologically intact cells, using a known positive control in each run (standard IHC practice). Do not infer fixation tolerance from tissue staining patterns or the protein’s topology and phosphorylation record (HPA tissue IHC; UniProt Q9C0D7).

What staining pattern should count as credible ZC3H12C localisation in IHC?

Assess signal within intact cell boundaries and record cytoplasmic, perinuclear and nuclear-rim patterns separately, using the same chromogen threshold across sections (standard IHC practice). Tissue IHC reports broadly cytoplasmic expression, whereas cell-based IF places ZC3H12C at the nuclear membrane and Golgi apparatus; these are different assay contexts (HPA tissue IHC; HPA subcellular). UniProt supplies no subcellular annotation and reports no transmembrane segment, so a sharply outlined plasma membrane alone needs independent validation (UniProt Q9C0D7). Compare staining with a no-primary control and tissue architecture before assigning fine organelle localisation from chromogenic sections (standard IHC practice).

How can isoforms or epitope accessibility complicate ZC3H12C IHC?

ZC3H12C has 2 recorded isoforms, but the supplied evidence does not map the catalog antibody’s epitope to either one (UniProt Q9C0D7; A13406 tissue-IHC caption). Its RNase NYN domain spans residues 245–400, and phosphoserine at residue 230 is recorded; neither fact establishes antibody recognition or retrieval sensitivity (UniProt Q9C0D7). If staining differs across specimens, verify the antibody’s immunogen or epitope documentation before describing an isoform-specific pattern (standard IHC practice). Compare adjacent sections under identical citrate pH 6.0 retrieval and detection conditions, then seek an independent antibody or orthogonal assay for any isoform claim (page retrieval specification; standard IHC practice).

How should IF help check a questionable ZC3H12C IHC pattern?

On a separate IF or ICC assay, pair ZC3H12C with a validated marker for the cell population being examined, such as respiratory epithelium when testing high-staining airway cells (HPA tissue IHC; standard IF practice). Choose a fluorophore channel with low tissue autofluorescence and include unstained and single-label controls before interpreting colocalisation (standard IF practice). Because cell-based IF reports nuclear-membrane and Golgi localisation, optimise permeabilisation for access to the antibody epitope on the relevant side of those membranes; the epitope side is not specified here (HPA subcellular; standard IF practice). Treat agreement as supporting evidence, while scoring the paraffin-section chromogenic result on its own controls (standard IHC/IF practice).

How do I reduce diffuse background without losing genuine ZC3H12C signal?

Run no-primary and detection-only sections to locate nonspecific chromogen deposition, and inspect tissue edges and damaged regions separately from intact cells (standard IHC practice). Block endogenous peroxidase before DAB detection and optimise protein blocking and washes as general chromogenic IHC steps, not as ZC3H12C-specific findings (standard IHC practice). If background persists, titrate the primary around the caption’s 5 µg/mL example while keeping citrate pH 6.0 retrieval fixed during that comparison (A13406 tissue-IHC caption; page retrieval specification; standard IHC practice). Retain a positive tissue control so reduced background is not mistaken for improved specificity when true signal has also disappeared (standard IHC practice).

What should I score when comparing ZC3H12C IHC between specimens? ⚠ ANSWER MARKED FOR VERIFICATION

Define the cell compartment and population before scoring; an H-score combines staining intensity and percentage of positive cells, while percentage positive alone may be clearer for heterogeneous fields (standard IHC practice). For spatial comparisons, report positive-cell density per mm² of viable, annotated tissue and normalise counts to the number of eligible cells or measured tissue area (standard IHC practice). Keep retrieval at citrate pH 6.0 for 20 min, imaging settings and threshold rules consistent across the comparison (page retrieval specification; standard IHC practice). Report cell type explicitly because HPA levels differ between respiratory epithelial cells and several other populations (HPA tissue IHC).

When is apparent ZC3H12C positivity more likely to be artefact?

Prioritise staining in intact, correctly identified cells that exceeds the no-primary control and recurs in comparable sections (standard IHC practice). High signal in respiratory epithelial cells is compatible with the tissue profile, whereas staining confined to alveolar cells or cardiomyocytes conflicts with reported nondetection and warrants verification (HPA tissue IHC). An isolated plasma-membrane outline also deserves scrutiny because cell-based IF reports nuclear-membrane and Golgi localisation, while tissue IHC describes cytoplasmic expression (HPA subcellular; HPA tissue IHC). Exclude edge effects, necrotic deposits and residual endogenous peroxidase before calling positivity, and qualify conclusions because HPA marks tissue-IHC reliability as Approved but notes low RNA–staining consistency and pending external verification (standard IHC practice; HPA tissue IHC).

Boster reagents

Best ZC3H12C / Probable ribonuclease ZC3H12C IHC Antibodies

A13406 has real IHC and IF images from human brain tissue (catalog image captions); its listed reactivity covers human, mouse and rat (catalog: reactivity).

Real IHC data Immunohistochemistry of ZC3H12C in human brain tissue with ZC3H12C antibody at 5 μg/mL.

Anti-Probable ribonuclease ZC3H12C ZC3H12C Antibody

Cat # A13406

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A13406 is listed for IHC-P and IF (catalog: applications), with IHC shown in human brain tissue at 5 μg/mL (catalog: IHC image caption). Its IF image shows human brain tissue at 20 μg/mL (catalog: IF image caption); mouse and rat are listed as reactive species (catalog: reactivity).

Which to pick: Choose A13406 for paraffin-section IHC (catalog: IHC-P application); its own IHC image shows human brain tissue at 5 μg/mL (catalog: IHC image caption), and the fixative is unreported (catalog: IHC image caption). For IF, A13406 has a human brain tissue image at 20 μg/mL (catalog: IF image caption); ICC validation is unreported (catalog: applications). For mouse or rat work, A13406 lists both species as reactive (catalog: reactivity), while the supplied IHC and IF images show human tissue (catalog: image captions).

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

References

UniProt Consortium. UniProt entry Q9C0D7 (ZC12C_HUMAN, Probable ribonuclease ZC3H12C).
Human Protein Atlas. ZC3H12C tissue IHC expression (reliability: Approved).
Human Protein Atlas. ZC3H12C subcellular location (ICC-IF): Localized to the nuclear membrane and the Golgi apparatus..
Human Protein Atlas. ZC3H12C antibody validation summary (2 antibodies).
Regulation of tumor metastasis and CD8(+) T cells infiltration by circRNF216/miR-576-5p/ZC3H12C axis in colorectal cancer. Cellular & molecular biology letters 2024 — PMC10809481.
Comprehensive landscape of the functions and prognostic value of RNA binding proteins in uterine corpus endometrial carcinoma. Frontiers in molecular biosciences 2022 — PMC9574853.
PubMed PMID:14702039 — UniProt-cited evidence.
PubMed PMID:16554811 — UniProt-cited evidence.
PubMed PMID:11214970 — UniProt-cited evidence.