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- Table of Contents
XRN1 / 5'-3' exoribonuclease 1 · Western blot design guide
Design a Western Blot for XRN1
Real validated XRN1 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-XRN1 WB antibodies. Everything you need to plan the experiment before you commit precious samples.
Evidence assembled September 2026 · For research use; verify linked source records and product datasheet before use
XRN1 Western Blot Experimental Design Guide
Expected bands, validated protocols, controls and antibodies — the at-a-glance facts below, then the full design guide.
Must know before running
| Expected band | ~194.1 kDa | |
| Observed band | ~200 kDa | |
| Gel | 5–20% (catalog A02855-2) | |
| Positive control | Adrenal gland (IHC candidate; verify WB) +4 more | |
| Negative control | Ovary (IHC candidate; verify WB) |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Phosphorylated | |
| Caveat | Phosphorylation-state controls | |
| Gene-set association | MSigDB C7 membership | |
| Isoform | 3 isoform(s) |
Section 1
Real Curated XRN1 Western Blot Protocols
The A02855-2 protocol combines labelled catalog values with standard starting conditions. Published comparisons retain their own sample, reagent and detection scope.
| Sample / lysate | human Hela, human SiHa, mouse NIH/3T3 (catalog A02855-2) |
| Gel % | 5–20% (catalog A02855-2) |
| Load | 30 ug; reducing conditions (catalog A02855-2) |
| Transfer | a nitrocellulose membrane at 150 mA for 50-90 minutes (catalog A02855-2) |
| Membrane | nitrocellulose membrane (catalog A02855-2) |
| Blocking | 5% non-fat milk/TBS for 1.5 hour at RT (catalog A02855-2) |
| Primary antibody | A02855-2 · 0.5 μg/mL (catalog A02855-2) |
| Primary incubation | overnight at 4°C (catalog A02855-2) |
| Secondary antibody | goat anti-rabbit IgG-HRP, 1:5000 (catalog A02855-2) |
| Secondary incubation | 1.5 hour at RT (catalog A02855-2) |
| Wash | TBS-0.1%Tween 3 times with 5 minutes each (catalog A02855-2) |
| Detection | ECL (catalog A02855-2) |
Section 2
What Is the Expected XRN1 Western Blot Band Size?
XRN1 is predicted at 194.1 kDa and observed near 200 kDa; the cause of the difference is not established.
| Band near 200 kDa | matches the empirical XRN1 band in whole-cell lysate |
| Band near 194.1 kDa | is near the predicted XRN1 mass; confirm its identity |
| Several bands near the XRN1 region | could include isoforms 1, 2, and 3; their migration is unestablished |
| One band without a visible isoform pattern | does not rule out XRN1 isoforms 1, 2, and 3 |
💡Expected XRN1 appearanceXRN1 has a predicted mass of 194.1 kDa and an empirical band near 200 kDa in whole-cell lysate; the difference is unexplained, so confirm band identity with XRN1 depletion or an independent antibody.
| Predicted XRN1 mass | 194.1 kDa predicted; the empirical band is near 200 kDa, with no established cause for the difference |
| Isoform 1 | may have a different mass from other isoforms; its migration is not supplied |
| Isoform 2 | may have a different mass from other isoforms; its migration is not supplied |
| Isoform 3 | may have a different mass from other isoforms; its migration is not supplied |
| Situation | Likely cause | Next action |
|---|---|---|
| No band in lysate | cytoplasmic XRN1 should be accessible in whole-cell lysate; sample or detection failure is possible | check lysate integrity, transfer near 200 kDa, and antibody performance |
| Band higher than expected | migration differs from the empirical 200 kDa band for an unestablished reason | check the molecular-weight marker and confirm identity by XRN1 depletion |
| Band lower than expected | a different isoform or protein breakdown is possible but unconfirmed | compare fresh lysate with XRN1-depleted lysate |
| Multiple bands | XRN1 has isoforms 1, 2, and 3, but their band positions are unknown | identify XRN1-dependent bands by depletion or an independent antibody |
| Weak or no signal | sample loading, transfer, or detection may be insufficient | check loading and high-mass transfer, then verify the antibody with a positive-control lysate |
| Fragments below expected size | protein breakdown is possible; no XRN1 cleavage product is specified | prepare fresh lysate and test whether the fragments decrease with improved sample handling |
Experiment evidence
Western blot images showing XRN1 band
A02855-2 · XRN1
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for XRN1 Western blot
🧪HPA-IHC candidate guidance (verify in WB): For positive controls for XRN1 in Western blot, you can use adrenal gland lysate, which HPA scores High.
Positive control: Adrenal gland (IHC candidate; verify WB)
Negative control: Ovary (IHC candidate; verify WB)
Loading controls: Run GAPDH, β-actin, and a total-protein stain alongside the samples.
⚠️Feasibility: Cytoplasmic XRN1 is suitable for whole-cell lysates, but confirm the HPA not-detected ovary result by Western blot.
HPA tissue expression evidence for XRN1
Comprehensive Human Protein Atlas IHC scoring per tissue. Rows are taken directly from the HPA tissue chart — click any row's HPA link to view the source.
Higher expression tissues · candidate positive controls from IHC
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Adrenal gland | glandular cells | High | Protein (IHC) | HPA → |
| Cerebellum | Purkinje cells | High | Protein (IHC) | HPA → |
| Cerebral cortex | endothelial cells | High | Protein (IHC) | HPA → |
| Duodenum | glandular cells | High | Protein (IHC) | HPA → |
| Gallbladder | glandular cells | High | Protein (IHC) | HPA → |
Lower expression tissues · IHC evidence, not confirmed WB-negative controls
| Tissue | Cell type | Level | Evidence | Source |
|---|---|---|---|---|
| Ovary | ovarian stroma cells | Not detected | Protein (IHC) | HPA → |
| Adipose tissue | adipocytes | Low | Protein (IHC) | HPA → |
| Cervix | glandular cells | Low | Protein (IHC) | HPA → |
| Epididymis | glandular cells | Low | Protein (IHC) | HPA → |
| Lymph node | non-germinal center cells | Low | Protein (IHC) | HPA → |
Section 3
Advanced XRN1 Western Blot Tips
Deeper troubleshooting and optimisation questions for XRN1, answered from its protein features.
How should XRN1 band migration be interpreted?
Band shift · Use the separately labelled calculated mass and catalog-observed evidence above. A sequence annotation does not establish an observed migration shift. Verify target identity with orthogonal controls.
How could XRN1 isoforms affect the bands I detect?
Isoforms · UniProt lists three isoforms. Isoform 3 replaces residues 449–459 and lacks residues 460–1706, so it could produce a much smaller band if the antibody recognizes its retained region. Isoform 2 has an insertion at 1354 and lacks residues 1540–1552; these changes do not establish a resolvable shift.
Which XRN1 phosphorylation sites matter when interpreting bands?
PTM · UniProt annotates phosphoserines at positions 1348 and 1645 in its reference sequence. Both positions fall within the region missing from isoform 3. These annotations do not establish that phosphorylation causes a visible band shift. Check which isoform and numbering convention an antibody or study uses before comparing site numbers.
Does this guide establish induction of XRN1?
Induction · No general induction response is established by this guide. A pathway or gene-set association is not evidence of induction in a particular specimen. Verify the relevant treatment and control in a target-specific experiment.
What transfer method to use for XRN1 Western blot?
Transfer · XRN1 is predicted at 194.1 kDa, so choose transfer conditions validated for proteins near 200 kDa and verify transfer in that region. The supplied features do not specify a membrane, buffer, or transfer time.
How should blocking be optimized?
Blocking · Standard workflow guidance: follow the A02855-2 datasheet where specified. Otherwise compare 5% milk or 5% BSA in TBST; for a phospho-specific assay start with BSA. Optimize background and specific signal with matched controls.
How should I quantify XRN1 if multiple bands appear?
Quantitation · Quantify a consistently identified band for the same isoform across samples. Record the antibody's recognition region: isoform 3 lacks residues 460–1706, while isoform 2 lacks residues 1540–1552. Avoid combining distinct bands unless their identities are established.
Why might XRN1 appear near 200 kDa instead of 194.1 kDa?
Interpretation · The observed band is about 200 kDa, close to the predicted 194.1 kDa for the 1,706-residue protein. The listed features do not establish the cause of the difference. Phosphorylation is annotated, but its presence alone does not demonstrate a visible shift.
Check whether the antibody recognizes residues retained in isoform 3. This isoform replaces residues 449–459 and lacks residues 460–1706, making a shorter product plausible. The sequence features alone cannot identify an observed band; verify its identity experimentally.
Check whether the antibody recognizes residues retained in isoform 3. This isoform replaces residues 449–459 and lacks residues 460–1706, making a shorter product plausible. The sequence features alone cannot identify an observed band; verify its identity experimentally.
Boster reagents
XRN1 Western Blot Antibodies
Catalog antibodies with Western blot application and product-specific WB images. Evaluate suitability with the reported sample, controls and experimental conditions.
Real WB data
Anti-XRN1 Antibody Picoband®
Cat # A02855-2
The listed anti-XRN1 antibody has a Western blot image showing a band near 200 kDa, compared with an expected 194 kDa. The caption reports HeLa, SiHa, and NIH/3T3 whole cell lysates; no independent validation is supplied.
Which to pick: A02855-2 is the only listed option. Its WB image includes human HeLa and SiHa and mouse NIH/3T3 lysates, using 30 µg per lane and 0.5 µg/mL primary antibody. These examples support those tested contexts, not every human or mouse sample.
Source: BosterBio XRN1 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry Q8IZH2.
- Human Protein Atlas. XRN1 tissue expression.
- PMC11982291 — target-verified WB comparison
- PMC11658763 — target-verified WB comparison