Bespoke and custom products at Abcam

Custom formulation and conjugation services

Reformulating and conjugating products to fit your specific needs.

All custom conjugations and formulations come with the same product quality and customer support you expect from standard catalog products. Let's start the discussion on how we can help advance your research.

Custom formulation services

Looking for an antibody in a non-standard formulation, and/or in a different concentration or selling size? We can definitely help. Check below the most commonly requested formulations:

  • BSA-free
  • ​Azide-free
  • Low endotoxin​, azide-free
  • ​Custom concentrations
  • Custom sizes

Custom conjugation services

We can fulfill conjugation needs outside our catalog offering. We can offer custom conjugation to:

  • Alexa Fluor®​ 405, 488, 555, 568, 594, 647, 680, 750, 790
  • Phycoerythrin (R-PE)
  • FITC
  • Biotin
  • HRP
  • GeoMx-formatted antibodies for use with Nanostring's GeoMx Digital Spatial Profiler

We encourage you to enquire if you have a conjugation needs outside of the above list.

Frequently asked questions


What delivery time frame can we expect for a custom conjugation request?

  • Expected delivery time of a custom conjugation depends on your order requirements. Please get in touch to get an accurate lead time.

Are larger volume requests deliverable in a single larger vial, or multiple smaller vials?​

  • In most cases we are able to offer the flexibility of either a single larger vial or multiple smaller vials depending on your preference.

May we send Abcam our own antibody for a custom conjugation?

  • ​​While we are unable to offer conjugation of non-Abcam antibodies, we have an extensive range of conjugation-ready carrier-free antibodies and conjugation kits available for use.​

What level of validation is conducted to ensure a custom conjugation was successful?

  • For custom conjugations, the Fluorophore: Protein (F:P) ratio is used for standard validation. QC of the unconjugated material is always perform to ensure batch-to-batch consistency. Further validation of the conjugate can be performed upon request. 

What is the F:P ratio?

  • The Fluorophore: Protein (F:P) ratio or Degree of labelling (DOL) is a measure of the average number of dyes per IgG for a given production batch. The F:P ratios are determined by spectrophotometric assay.


  • Alexa Fluor® is a registered trademark of Life Technologies. Alexa Fluor® dye conjugates contain(s) technology licensed to Abcam by Life Technologies.​
  • Cy® and CyDye® are trademarks of GE Healthcare Limited. 
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