Blocking Peptides

Peptides

Blocking Peptides

Confirm antibody specificity before you trust your data

Blocking peptides are synthetic replicas of an antibody's target epitope. Pre-incubating an antibody with its matching blocking peptide competitively inhibits off-target binding, helping to confirm specificity in Western blot, IHC, and ELISA.

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How it works

Epitope-matched competitive inhibition

Each blocking peptide is synthesised to match the exact epitope recognised by its corresponding antibody. When the antibody is pre-incubated with the peptide, the peptide occupies the antibody's binding site. Applying that mixture to a Western blot or IHC sample and seeing the signal drop out confirms the antibody was binding that epitope specifically, rather than an off-target site.

Category benefits

Why use blocking peptides?

✓	Validate antibody specificity Pre-incubate your antibody with a matching blocking peptide to confirm it binds specifically to your target protein.
✓	High purity and epitope precision Peptides are synthesised to exactly match your antigen's epitope, so the competition step reflects the real binding site.
✓	Reduce background and false positives Use a blocking peptide to distinguish specific signal from non-specific background in IHC and Western blot.
✓	Batch-by-batch quality control Every peptide is quality-controlled to support reproducible performance from lot to lot.

Where they're used

Typical applications

✓	Western blot validation Pre-incubate the antibody with the blocking peptide before probing the blot. Loss of the band confirms the antibody was detecting that target.
✓	Immunohistochemistry (IHC) Confirm accurate epitope recognition in tissue sections and rule out off-target staining before drawing conclusions from a slide.
✓	ELISA and antibody validation workflows Support broader antibody validation alongside coating and detection steps in ELISA assay development.
✓	Receptor and neurological target research Validate antibodies against receptor and neurological targets, for example confirming specificity for serotonin receptor or alpha synuclein antibodies in synucleinopathy research.

Not sure which peptide matches your antibody?

Our team can help you identify the correct blocking peptide for your specific antibody and target. Contact us for support choosing the right match from our catalogue.

Looking for more validation tools?

Browse our full range of blocking peptides for antibody validation across WB, IHC, and ELISA.

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For Research Use Only. Not for use in diagnostic procedures.