Buy two, get one free

This promotion has now ended, thank you for participating!

Stock up on antibodies and other lab reagents for your new projects. Purchase 2 full-size products and receive another full-size product completely free.

This promo has ended, thank you for participating! 
Offer ends June 30th, 2022. Valid in Europe, US and Canada*  
Click here to browse all HumanKine® Proteins Click here to browse all Primary Antibodies Click here to browse all Neutralizing™ Antibodies Click here to browse CoraLite® Conjugated Antibodies Click here to browse Tag/Control Antibodies


What defines a “Full-sized” product?

All of the following are considered full-sized products:

  • 150 ul Primary Antibodies
  • HumanKine® Proteins - 10ug size included only
  • Tag/Control Antibodies
  • ELISA Kits**
  • Flow Antibodies
  • CoraLite® Conjugated Antibodies
  • Neutralizing Antibodies
  • Fusion Proteins
  • Protein ladders
  • Secondary Antibodies

Do I qualify for a free product if I purchase one $335 primary antibody and one $266 HumanKine® Protein?

  • Yes, you can mix and match various product categories in the promotion.

  • Your free product must be $266 or less.

Do I qualify for a free product if I purchase a 20ul trial size primary antibody and a 25ug neutralizing antibody?

  • No, neither of these products are considered full-sized. You must purchase two full-sized products in order to qualify.

Do I qualify for a free product if I purchase a $149 Tag/Control Antibody and a $35 Flow Antibody?

  • Yes, both are considered full-sized products.

  • Your free product must be $35 or less.

If you need assistance with ordering or have any questions relating to our products or services, contact us via email  or phone (312-455-8498). You can also speak to a Proteintech representative via our 24-hour Live Chat.

 Terms and Conditions:

  1. *This offer is available until June 30th, 2022 in the Europe, US and Canada only.
  2. This offer is valid for 1 free product of equal or lesser value with the purchase of 2 full-size products.
  3. Promo code may be used to redeem multiple free products in one order. Each free product requires the purchase of 2 full-sized products.
  4. Antibody trial packs cannot be redeemed as a single item.
  5. Exclusions: HumanKine products over 10µgs, all ChromoTek® products, $109 Trial Size antibodies, 25ug neutralizing antibodies.
  6. ** Offer can only be applied to ELISA Kits priced at $399. Exclusions apply.
  7. This promotion cannot be used in conjunction with other offers.
  8. Proteintech reserves the right to refuse or amend this promotion at any time.
  9. Available for direct orders only.