SLC7A11 / Cystine/glutamate transporter · Western blot design guide

Design a Western Blot for SLC7A11

Real validated SLC7A11 Western blot protocols, expected-band and isoform facts, troubleshooting for weak or shifted signal, and recommended anti-SLC7A11 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

Western blot protocol sheet for SLC7A11: expected band ~55.4 kDa, hero antibody A03036-2, catalog values and labelled standard workflow; separate PMC comparisons on the guide — Printable **SLC7A11** Western blot protocol sheet — expected band ~55.4 kDa, antibody A03036-2, controls and PMC citations. Open the full SLC7A11 WB guide →

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SLC7A11 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	~55.4 kDa
	Observed band	~40–50 kDa
	Gel	10% (catalog A03036-2)
	Negative control ⓘ	Suggested KO / knockdown lysate

Important caveats

Reasons your observed band may differ from the expected size.

	PTM	Glycosylated + Phosphorylated
	Caveat	Modification-state controls
	Gene-set association	MSigDB Hallmark membership
	Isoform	1 isoform(s)

Section 1

Real Curated SLC7A11 Western Blot Protocols

The A03036-2 protocol combines labelled catalog values with standard starting conditions. Published comparisons retain their own sample, reagent and detection scope.

Recommended Western blot protocol parameters
Sample / lysate	human HepG2, human A549, human Hela (catalog A03036-2)
Gel %	10% (catalog A03036-2)
Load	30 ug; reducing conditions (catalog A03036-2)
Transfer	a nitrocellulose membrane at 150 mA for 50-90 minutes (catalog A03036-2)
Membrane	nitrocellulose membrane (catalog A03036-2)
Blocking	5% non-fat milk/TBS for 1.5 hour at RT (catalog A03036-2)
Primary antibody	A03036-2 · 0.5 μg/mL (catalog A03036-2)
Primary incubation	overnight at 4°C (catalog A03036-2)
Secondary antibody	goat anti-rabbit IgG-HRP, 1:5000 (catalog A03036-2)
Secondary incubation	1.5 hour at RT (catalog A03036-2)
Wash	TBS-0.1%Tween 3 times with 5 minutes each (catalog A03036-2)
Detection	ECL (catalog A03036-2)

Section 2

What Is the Expected SLC7A11 Western Blot Band Size?

SLC7A11 is predicted at 55.4 kDa, but an empirical band appears at ~40–50 kDa; the cause of this difference is not established.

What am I looking at on my blot?
Band at ~40–50 kDa	Empirical SLC7A11 band; confirm identity with an appropriate control
Band near 55.4 kDa	Near the predicted SLC7A11 mass, though migration at this position is not established
Higher band under nonreducing conditions	Could contain the disulfide-linked SLC7A11–SLC3A2 heterodimer; its mass is not supplied
Variable monomer-band position	Could reflect N-linked glycosylation at Asn314; a visible shift is not established

💡Expected SLC7A11 appearanceSLC7A11 has a predicted mass of 55.4 kDa, while antibody QC reports a ~40–50 kDa band; the cause of the difference is unestablished, so confirm band identity with appropriate controls.

How each factor affects band size
Predicted SLC7A11 mass	55.4 kDa by sequence; the empirical band is ~40–50 kDa
N-linked glycosylation at Asn314	May affect migration, but a visible size change is not established
Inter-chain disulfide at Cys158	Can retain a higher-mass complex when reduction is incomplete
Heterodimer with SLC3A2/4F2hc	Can migrate above the SLC7A11 monomer under nonreducing conditions; partner mass is not supplied

Why is my band missing or off?
Situation	Likely cause	Next action
No band in lysate	SLC7A11 is a multi-pass membrane protein that may be poorly recovered	Check membrane-protein extraction and run a positive control
Band higher than expected	The disulfide-linked SLC3A2 complex may persist	Compare reducing and nonreducing samples
Band lower than expected	The reported ~40–50 kDa band is below the 55.4 kDa predicted mass; the cause is unestablished	Confirm identity with a positive control and an independent SLC7A11 antibody
Multiple bands	Monomer and disulfide-linked complex may both be present	Compare reducing and nonreducing lanes and verify band identity
Weak or no signal	Recovery of multi-pass membrane SLC7A11 may be low	Check membrane enrichment and include a positive control

Source: UniProt Q9UPY5 Human Protein Atlas product datasheet (A03036-2)

Experiment evidence

Western blot images showing SLC7A11 band

A03036-2 · SLC7A11

M03036 · SLC7A11

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Real WB data behind the band-size expectations in this section.

Sample controls for SLC7A11 Western blot

🧪For positive controls for SLC7A11 in Western blot, you can use a sample independently validated to express SLC7A11; the supplied HPA data identify no positive tissue or cell line.

Positive control: No high/medium HPA tissue identified

Negative control: Suggested KO / knockdown lysate

Loading controls: Run GAPDH, β-actin, and a total-protein stain alongside the samples.

⚠️Feasibility: HPA provides no tissue control candidates, so validate expression and use a knockdown or KO sample to confirm the membrane-protein band.

HPA tissue expression evidence for SLC7A11

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
No high/medium HPA tissues identified in the supplied evidence.

Lower expression tissues · IHC evidence, not confirmed WB-negative controls

Tissue	Cell type	Level	Evidence	Source
No lower-expression tissue rows available in the supplied evidence.

Section 3

Advanced SLC7A11 Western Blot Tips

Deeper troubleshooting and optimisation questions for SLC7A11, answered from its protein features.

How should SLC7A11 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.

Are multiple SLC7A11 bands explained by listed isoforms?

Isoforms · The supplied UniProt record lists one isoform and no alternative sequence. It therefore does not provide an isoform-based assignment for additional bands. Verify unexpected bands independently.

Could glycosylation affect the SLC7A11 band?

PTM · UniProt lists one N-linked glycosylation site at Asn314. Compare appropriately treated and untreated samples if testing its contribution. The listed site alone does not establish a visible shift or explain the observed mass.

UniProt lists phosphoserine at Ser26. Keep that UniProt coordinate when documenting the site; antibody or paper numbering may differ. This annotation alone does not establish a visible band shift.

Does this guide establish induction of SLC7A11?

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 SLC7A11 Western blot?

Transfer · SLC7A11 is a 501-residue, multi-pass membrane protein. Check transfer recovery for the band of interest when selecting conditions. The supplied features do not specify a validated transfer method.

How should blocking be optimized?

Blocking · Standard workflow guidance: follow the A03036-2 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 SLC7A11 bands be quantified across samples?

Quantitation · Quantify the same identified band across samples using consistent preparation and reducing conditions. SLC7A11 forms a disulfide-linked heterodimer with SLC3A2/4F2hc, so differing preparation conditions can complicate comparisons of band signals.

Why might SLC7A11 appear at 40–50 kDa instead of 55.4 kDa?

Interpretation · The supplied observed band is approximately 40–50 kDa, while the predicted mass is 55.4 kDa. The listed features do not establish why they differ. Identify the band using appropriate controls rather than assigning the difference to a specific modification.

SLC7A11 forms a disulfide-linked heterodimer with SLC3A2/4F2hc. Compare reducing and nonreducing preparations when assessing a higher-mass signal, and use suitable controls to identify it. The interaction does not establish the identity of any observed band.

Boster reagents

SLC7A11 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

Western blot analysis of xCT/SLC7A11 using anti-xCT/SLC7A11 antibody (A03036-2). Electrophoresis was performed on a 10% SDS-PAGE gel at 80V (Stacking gel) / 120V (Resolving gel) for 2 hours. The sample well of each lane was loaded with 30 ug of sample under reducing conditions. Lane 1: human HepG2 whole cell lysates, Lane 2: human A549 whole cell lysates, Lane 3: human Hela whole cell lysates, Lane 4: human U2OS whole cell lysates, Lane 5: rat C6 whole cell lysates, Lane 6: mouse Neuro-2a whole cell lysates. After electrophoresis, proteins were transferred to a nitrocellulose membrane at 150 mA for 50-90 minutes. Blocked the membrane with 5% non-fat milk/TBS for 1.5 hour at RT. The membrane was incubated with rabbit anti-xCT/SLC7A11 antigen affinity purified polyclonal antibody (A03036-2) at 0.5 μg/mL overnight at 4°C, then washed with TBS-0.1%Tween 3 times with 5 minutes each and probed with a goat anti-rabbit IgG-HRP secondary antibody at a dilution of 1:5000 for 1.5 hour at RT. The signal is developed using an ECL Plus Western Blotting Substrate (Catalog # AR1196-200) with Tanon 5200 system. A specific band was detected for xCT/SLC7A11 at approximately 40-50 kDa. The expected band size for xCT/SLC7A11 is at 55 kDa.

Anti-xCT/SLC7A11 Antibody Picoband®

Cat # A03036-2

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Real WB data Western blot analysis of xCT expression in (1) HepG2 cell lysate; (2) Mouse brain lysate.

Anti-xCT Rabbit Monoclonal Antibody

Cat # M03036

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Both listed anti-SLC7A11 antibodies report human, mouse, and rat reactivity and have WB images. A03036-2 shows a 40–50 kDa band in named human, rat, and mouse cell lysates, below the stated 55 kDa expectation; M03036 shows HepG2 and mouse brain lysates.

Which to pick: Choose A03036-2 for a WB example that includes rat C6 cells alongside human and mouse cell lines. Choose M03036 if mouse brain is the closer sample match. Its supplied WB caption does not show a rat sample, despite reported rat reactivity.

Source: BosterBio SLC7A11 gene-info card — filtered to Western-blot-capable antibodies; each card shows that product's actual WB validation figure.

References

UniProt Consortium. UniProt entry Q9UPY5.
Human Protein Atlas. SLC7A11 tissue expression.
PMC13361866 — target-verified WB comparison
PMC12117028 — target-verified WB comparison
PMC12097587 — target-verified WB comparison