Custom Recombinant Monoclonal Antibody Generation

60,000+ Custom antibodies delivered
3,000+ Phage display campaigns
20+ Years of experience
90%+ Repeat customers


Bio-Rad's custom antibody generation service uses antibody phage display technology to create highly specific, high-affinity recombinant monoclonal antibodies for research, bioanalytical, and diagnostic use—with no animal immunization.

When the specialized antibody you need is not commercially available, our HuCAL® and Pioneer™ Select platforms deliver purified, sequenced antibodies in as little as 4 weeks.


When Do You Need a Custom Antibody?

A custom antibody generation service is the right choice whenever no commercial reagent meets your specificity, format, or supply requirements. Common scenarios include:

  • Generating anti-idiotype antibodies for pharmacokinetic and immunogenicity testing

  • Developing a custom analytical antibody for a demanding bioanalytical, clinical, or diagnostic assay

  • Characterizing a novel protein or unique biological product for which no antibody exists

  • Developing an in vitro diagnostic method where a specific antibody is required

  • Detecting understudied targets—mutant, low-abundance, or structurally complex proteins in basic research

  • Not sure if your target fits?

    Our specialists will tell you within one conversation.


The Technology

What Is Antibody Phage Display?

A scientist in safety goggles examining a sample in a pipette tip

Antibody phage display is an in vitro technology that screens vast libraries of antibody fragments displayed on the surface of bacteriophages to identify binders against a target antigen.

Because selection happens in a test tube rather than in an animal, the process can be guided toward the exact specificity, affinity, and format you need—even against toxic or non-immunogenic antigens.

With more than 20 years of expertise in antibody phage display, Bio-Rad has been delivering custom antibody generation services using the well-established HuCAL antibody library and the newer Pioneer library.

Have a Target in Mind?

Share your antigen and application, and our antibody specialists will recommend the right phage display route for your project.


How Bio-Rad's Custom Antibody Generation Works

Bio-Rad generates custom antibodies entirely in vitro through a high-throughput phage display workflow, managed end to end by automated systems and dedicated technical experts.

1. Project design
Our experts confirm the target/antigen, required specificity, and downstream format with you.
2. Planning
The HuCAL® or Pioneer library is screened against your antigen to enrich specific binders.
3. Screening
Individual clones are tested to confirm specificity and affinity.
4. Sequencing
Selected antibodies are sequenced to establish identity and ensure long-term security of supply.
5. Expression and purification
Recombinant antibodies are produced in E. coli or CHO cells and delivered as purified Fab.
6. Optional conversion
SpyCatcher coupling converts SpyTag Fab into multiple formats; Ig conversion delivers your chosen isotype expressed in mammalian cells. 

Purified Fab in Weeks—Not Months

A standard project delivers purified Fab antibodies just 7–8 weeks after antigen receipt, compared with the 4 to 9 months required by conventional monoclonal approaches that rely on animal immunization. A fast-track option is available in some cases, enabling delivery in 4–5 weeks.


Bio-Rad supported us in generating antibodies with fast dissociation kinetics for continuous protein monitoring. From the candidate antibodies, we identified an antibody pair with suitable affinity and kinetic properties for a sandwich-based continuous biosensor. We greatly appreciated Bio-Rad’s expertise, support, and professional services.

Helia Biomonitoring

Phage Display vs. Conventional Animal Generation

In vitro phage display sidesteps the main limitations of animal immunization—speed, animal use, and difficult antigens.

Criterion Bio-Rad Antibody Phage Display Conventional Animal Immunization
Animal use No Yes
Antigen type Toxic antigens, immunosuppressants, non-immunogenic antigens, antigen complexes, and even cell lines Technical challenges toward toxins and antigen complexes
Antigen needed 0.2–0.5 mg Several mg
Timeline 7–8 weeks regular · 4–5 weeks fast-track 4–9 months
Flexible formats Fab (mono- and bivalent), full-length immunoglobulins, many isotypes No
Specificity In vitro guided selection to desired specificity Not predictable; extensive screening required
Fully human Yes—Fc from different species available on request No
Technology CysDisplay/SpyDisplay Immunization, hybridoma
Success rate >90% ~75%

Bio-Rad's Custom Antibody Generation Service Offerings

Both Pioneer Select and the HuCAL service use Bio-Rad's phage display expertise and deliver fully human recombinant antibodies. The right choice depends on your specific requirements, timeline, and downstream use.

Feature Pioneer Select HuCAL Custom Antibody Service
Core chemistry SpyTag/SpyCatcher covalent ligation (SpyDisplay) Disulfide-linked Fab–pIII fusion (CysDisplay)
Library Pioneer (~225B, 4 frameworks) HuCAL Platinum (~45B, 42 frameworks)
Best affinity range ~0.1 nM 1–0.1 nM
Timeline* 7 weeks 8 weeks‡
Clinical monitoring / IVD license No additional license Additional license required
Therapeutic license Optional pathway available May not be used for therapeutics
Ideal for High-affinity, clinical monitoring, IVD, and rapid prototyping Routine, robust anti-idiotype and research antibody generation


* Standard projects are scheduled within 3 weeks of antigen receipt.  
‡ Fast-track option available with delivery in ~4 weeks without scheduling. 

Choose Pioneer Select if you need:

  • High-affinity antibodies (sub-nM) for demanding bioanalytical assays
  • Higher risk mitigation, speed, or future therapeutic flexibility
  • Unrestricted IVD or clinical monitoring use without extra licensing fees

Choose HuCAL if your project prioritizes:

  • Cost-efficiency for standard bioanalytical workflows
  • Research-use-only applications where single-digit nM affinity is sufficient
  • Multiple routine projects with clearly defined, predictable performance needs

Custom Antibody Generation at a Glance

Two Bio-Rad scientists in lab coats reviewing results together at a laboratory workstation
  • Highly specific, high-affinity recombinant monoclonal antibodies
  • Fab antibodies selected in as little as 4 weeks
  • Mono- and bivalent Fab formats with detection tags
  • Conversion to full-length immunoglobulin with a choice of isotypes
  • Antibodies sequenced for long-term security of supply
  • No immunization of animals
  • Dedicated, highly experienced technical experts to design and manage your project

Simplified Sourcing via Scientist.com and ScienceExchange

Scientist.com Registered Supplier Science Exchange Verified Supplier

Access Bio-Rad custom antibody generation services through the Scientist.com and ScienceExchange marketplaces.

My Green Lab Certified!

My Green Lab Certified

Our custom antibody services based in Neuried (Munich), Germany, are My Green Lab certified!


Frequently Asked Questions

What is antibody phage display?


Antibody phage display is an in vitro method that screens large libraries of antibody fragments displayed on bacteriophages to identify binders to a target antigen—with no animal immunization required.

How long does custom antibody generation take?


With Bio-Rad's phage display service, purified Fab antibodies are typically ready 7–8 weeks after antigen receipt, and a fast-track option can deliver in about 4 weeks.

Why should I choose Bio-Rad over other providers?


Bio-Rad has over 20 years of antibody phage display experience. We've successfully delivered over 60,000 custom antibodies in more than 3,000 projects with over 90% success rate. Our HuCAL and Pioneer Select platforms are supported end to end by dedicated technical experts, deliver fully sequenced, non-animal-derived, fully human antibodies in as little as 4 weeks, and offer flexible formats.

What material is required to initiate a project?


0.2–0.5 mg of purified antigen is required for panning. If you have special antigens, such as peptides, oligos, or cells, please consult with our sales specialists.

How do I get started with Bio-Rad?


Tell us about your target and we will recommend the right antibody generation service for your project. Submit an inquiry form or send an email to antibody_sales_de@bio-rad.com.


Contact Us

Address Phone Email
Campus Neuried, Anna-Sigmund-Str. 5
82061 Neuried, Germany
+49 89 809095-10 antibody_sales_de@bio-rad.com