3 for 2 on Antibodies
Stock up and save on your next discovery. Buy any two antibodies, get a third free.
Highly cited polyclonal, monoclonal, recombinant, and conjugated antibodies to help you reach your goals.
When you need it all.
Use promo code: 3FOR2AB
Offer valid from 1 to 30 November 2026. Terms and conditions apply.
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Rigorously tested for target specificity including KD/KO validation
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Broad target coverage across multiple research areas
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Validated in WB, IP, ELISA, IHC, IF, FC, & more
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Cited in >500,000 citations
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Reactivity against multiple species
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Self-manufactured catalog with in-house validation
Search our catalog of Primary Antibodies
Proteintech is a leading provider of primary antibodies with an extensive portfolio of polyclonal, monoclonal, and recombinant antibodies. All our primary antibodies are developed and validated in-house by Proteintech scientists to ensure high specificity and lot-to-lot consistency.
Polyclonal Antibodies
Recognize multiple epitopes on the protein of interest. Binds with very high affinity. Good for low abundant targets, rare species and mutated proteins.
Proteintech polyclonals are raised in rabbit.
Monoclonal Antibodies
Recognize a single epitope on the protein of interest. Low background, highly specific. Good for mid-high abundant targets.
Proteintech monoclonal antibodies are raised in mouse.
Recombinant Antibodies
Genetically defined monoclonals, recombinantly produced. Unrivaled reproducibility. Good for long-term, high-level projects.
Proteintech recombinant antibodies are raised in rabbit. Learn more about our recombinant antibody production process.
CoraLite-conjugated Antibodies
Proteintech offers the most extensive portfolio of fluorophore-conjugated antibodies, specifically developed and validated for immunofluorescence applications.
Now available with CoraLite Plus 488, 555, 594, and 647.
Terms and Conditions:
- This promotion is available to customers based in the United Kingdom and eligible European countries only. Orders must be shipped to an address in the United Kingdom or an eligible European country. Orders shipped elsewhere are not eligible, regardless of the billing address.
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The promotion runs from 1 November to 30 November 2026.
- Customers must purchase any two qualifying antibodies to receive a third qualifying antibody free of charge. Eligible products include full-size and 20 µl antibodies, subject to the exclusions outlined below.
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The free product will be the item of equal or lesser value within the qualifying order. Any additional qualifying products will be charged at the applicable full price.
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The offer applies to orders of up to 9 qualifying products (6 paid and 3 free) per order.
- PBS-only versions of full-size antibodies are excluded from this promotion and must be purchased at full price.
- All ChromoTek and HumanKine products are excluded from this promotion.
- Tag and control antibodies are included in this promotion.
- Antibody trial packs cannot be redeemed as a single item.
- This promotion cannot be combined with any other promotional offer or discount.
- The promotion code 3FOR2AB must be entered at checkout, or quoted on your email or fax order, for the offer to be applied. The promotion cannot be applied retroactively.
- This offer is available for direct orders only.
- Standard shipping charges still apply.
- Proteintech reserves the right to amend, withdraw or cancel this promotion at any time.
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