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- Table of Contents
NRAS / GTPase NRas · Western blot design guide
Design a Western Blot for NRAS
Real validated NRAS Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-NRAS 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
NRAS 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 | ~21.2 kDa | |
| Observed band | ~21 kDa | |
| Gel | 12% (catalog A00099-3) | |
| Positive control | Appendix (IHC candidate; verify WB) +4 more | |
| Negative control | Adipose tissue (IHC candidate; verify WB) |
Important caveats
Reasons your observed band may differ from the expected size.
| PTM | Toxin-dependent O-glucosylation + Phosphorylated | |
| Caveat | Modification-state controls | |
| Gene-set association | MSigDB C7 membership | |
| Isoform | 1 isoform(s) |
Section 1
Real Curated NRAS Western Blot Protocols
The A00099-3 protocol combines labelled catalog values with standard starting conditions. Published comparisons retain their own sample, reagent and detection scope.
| Sample / lysate | human MCF-7, human U251, human A431 (catalog A00099-3) |
| Gel % | 12% (catalog A00099-3) |
| Load | 30 ug; reducing conditions (catalog A00099-3) |
| Transfer | a nitrocellulose membrane at 150 mA for 50-90 minutes (catalog A00099-3) |
| Membrane | nitrocellulose membrane (catalog A00099-3) |
| Blocking | 5% non-fat milk/TBS for 1.5 hour at RT (catalog A00099-3) |
| Primary antibody | A00099-3 · 0.5 μg/mL (catalog A00099-3) |
| Primary incubation | overnight at 4°C (catalog A00099-3) |
| Secondary antibody | goat anti-rabbit IgG-HRP, 1:5000 (catalog A00099-3) |
| Secondary incubation | 1.5 hour at RT (catalog A00099-3) |
| Wash | TBS-0.1%Tween 3 times with 5 minutes each (catalog A00099-3) |
| Detection | ECL (catalog A00099-3) |
Section 2
What Is the Expected NRAS Western Blot Band Size?
NRAS is predicted at 21.2 kDa and observed near 21 kDa; the small difference has no established cause in the supplied evidence.
| Band near 21 kDa | Matches the empirical NRAS band and its 21.2 kDa predicted mass. |
| Band slightly below the precursor position | Could reflect removal of the 187–189 propeptide; a visible difference is not established. |
| Band near 21 kDa without a distinct shifted band | Thr35 glucosylation requires P. sordellii toxin TcsL and need not produce a visible shift. |
| Weak or absent band in a soluble fraction | NRAS associates with the cytoplasmic side of cell and Golgi membranes. |
💡Expected NRAS appearanceExpect a band near the empirically observed ~21 kDa, close to the 21.2 kDa predicted mass; confirm its identity with ordinary band-identity controls if other bands appear.
| Predicted molecular mass | The 21.2 kDa prediction places NRAS near the observed ~21 kDa band. |
| 189-residue precursor | Provides the full-length reference for the predicted mass. |
| 187–189 propeptide cleavage | Could make mature NRAS slightly smaller than its precursor; a resolved shift is not established. |
| Thr35 O-linked glucose | Occurs with P. sordellii toxin TcsL; a visible size shift is not established. |
| Situation | Likely cause | Next action |
|---|---|---|
| No band in lysate | Membrane-associated NRAS may be poorly recovered by the extraction method. | Check membrane protein recovery and use a whole-cell lysate control. |
| Band higher than expected | The supplied features do not establish a substantial upward shift; Thr35 glucosylation is toxin-dependent. | Check toxin exposure and verify band identity with NRAS depletion. |
| Band lower than expected | Removal of the 187–189 propeptide could slightly reduce mass. | Compare with the ~21 kDa reference and verify larger differences with NRAS depletion. |
| Multiple bands | Only one isoform is listed, so additional bands have no established isoform assignment. | Use NRAS depletion to identify the specific band. |
| Weak or no signal | Recovery of membrane-associated NRAS may be low. | Check extraction efficiency and sample loading with a suitable control. |
Experiment evidence
Western blot images showing NRAS band
A00099-3 · NRAS
M00099 · NRAS
M00099-2 · NRAS
M00099-1 · NRAS
← swipe / scroll for more images →
Real WB data behind the band-size expectations in this section.
Sample controls for NRAS Western blot
🧪HPA-IHC candidate guidance (verify in WB): For positive controls for NRAS in Western blot, you can use appendix tissue, which HPA rates High.
Positive control: Appendix (IHC candidate; verify WB)
Negative control: Adipose tissue (IHC candidate; verify WB)
Loading controls: Run GAPDH, β-actin, and a total-protein stain alongside NRAS.
⚠️Feasibility: NRAS is membrane-associated, so membrane-enriched lysate may improve detection.
HPA tissue expression evidence for NRAS
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 |
|---|---|---|---|---|
| Appendix | glandular cells | High | Protein (IHC) | HPA → |
| Colon | glandular cells | High | Protein (IHC) | HPA → |
| Duodenum | glandular cells | High | Protein (IHC) | HPA → |
| Gallbladder | glandular cells | High | Protein (IHC) | HPA → |
| Rectum | glandular cells | High | Protein (IHC) | HPA → |
Lower expression tissues · IHC evidence, not confirmed WB-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 → |
| Caudate | glial cells | Not detected | Protein (IHC) | HPA → |
| Cervix | glandular cells | Not detected | Protein (IHC) | HPA → |
Section 3
Advanced NRAS Western Blot Tips
Deeper troubleshooting and optimisation questions for NRAS, answered from its protein features.
How should NRAS 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.
Can NRAS isoforms explain multiple bands?
Isoforms · Only one isoform is listed, with no alternative sequence. Do not assign additional bands to NRAS isoforms on this evidence.
Does phosphorylation predict an NRAS band shift?
PTM · UniProt lists phosphoserine at position 89. That site does not by itself establish a visible shift. If comparing site numbering with a paper or antibody, check its sequence convention before assigning Ser89.
Does this guide establish induction of NRAS?
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 NRAS Western blot?
Transfer · The features establish a small protein, predicted at 21.2 kDa, but do not specify a transfer method. Check recovery of the approximately 21 kDa band on the membrane and whether protein passes through it when optimizing transfer.
How should blocking be optimized?
Blocking · Standard workflow guidance: follow the A00099-3 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 NRAS be quantified?
Quantitation · Standard workflow guidance: quantify only a validated target band within the linear exposure range. Use consistent sample preparation and loading, retain biological replicates, and avoid interpreting saturation or loading differences as regulation.
Why does NRAS appear near 21 kDa?
Interpretation · The predicted mass is 21.2 kDa, consistent with the reported band near 21 kDa. The listed features alone do not establish a detectable shift from that mass.
UniProt lists O-linked glucose at Thr35 during microbial infection, added by P. sordellii toxin TcsL. Consider this modification when interpreting samples exposed to that infection or toxin; the feature alone does not establish a visible band shift.
NRAS is lipid-anchored on the cytoplasmic side of cell and Golgi membranes. Use a preparation that recovers membrane-associated protein consistently across samples.
Keep recovery of membrane-associated NRAS consistent across samples and normalize the approximately 21 kDa signal to an appropriate loading measure. Its listed interactions favor the active GTP-bound form, so total NRAS abundance alone does not measure that active state.
Compare them with the expected approximately 21 kDa band. The listed Ser89 phosphorylation, infection-associated Thr35 glucosylation, and propeptide at positions 187–189 do not independently identify another band. Validate band identity before assigning it to a modification or processing event.
UniProt lists O-linked glucose at Thr35 during microbial infection, added by P. sordellii toxin TcsL. Consider this modification when interpreting samples exposed to that infection or toxin; the feature alone does not establish a visible band shift.
NRAS is lipid-anchored on the cytoplasmic side of cell and Golgi membranes. Use a preparation that recovers membrane-associated protein consistently across samples.
Keep recovery of membrane-associated NRAS consistent across samples and normalize the approximately 21 kDa signal to an appropriate loading measure. Its listed interactions favor the active GTP-bound form, so total NRAS abundance alone does not measure that active state.
Compare them with the expected approximately 21 kDa band. The listed Ser89 phosphorylation, infection-associated Thr35 glucosylation, and propeptide at positions 187–189 do not independently identify another band. Validate band identity before assigning it to a modification or processing event.
Boster reagents
NRAS 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-NRAS Antibody Picoband®
Cat # A00099-3
Real WB data
Anti-Ras NRAS Rabbit Monoclonal Antibody
Cat # M00099
Real WB data
Anti-Ras NRAS Rabbit Monoclonal Antibody
Cat # M00099-2
Real WB data
Anti-KRAS+HRAS+NRAS Rabbit Monoclonal Antibody
Cat # M00099-1
All four listed antibodies have WB images and report human, mouse, and rat reactivity. A00099-3 and M00099 show approximately 21 kDa bands in named lysates. M00099-2 has a brief Ras blot caption; M00099-1 targets KRAS, HRAS, and NRAS.
Which to pick: For NRAS blots, compare the documented samples and conditions for polyclonal A00099-3 and monoclonal M00099. M00099-2 has less detailed WB evidence. Choose M00099-1 when detecting KRAS, HRAS, and NRAS together suits the experiment.
Source: BosterBio NRAS gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.
References
- UniProt Consortium. UniProt entry P01111.
- Human Protein Atlas. NRAS tissue expression.
- PMC5308721 — target-verified WB comparison
- PMC6438458 — target-verified WB comparison
- PMC12782284 — target-verified WB comparison