Single Domain Antibodies (VHHs)

What VHHs services do we offer?

Wageningen Bioveterinary Research (WBVR) offers the following single domain antibody services:

• Looking for VHHs for your research? We have an elaborate collection of VHHs for various antigens. The majority of them are directed against veterinary infectious diseases.
• In need of a custom produced VHH/nanobody? We can generate single domain antibodies against antigens supplied by our customers and customise according to their requirement.

What technology do we use to generate VHHs?

There are many ways to generate single domain antibodies in vivo and in vitro. The most common is generating an immunised or naive library, and screening by phage/yeast display. The most successfully applied platform technology in the context of antibody discovery is phage display. With the controlled selection and screening strategies, display technologies allow the generation of single domain antibodies against the defined antigens, their conformations or epitopes.

What are the project phases?

We offer you VHH isolation services against a wide variety of antigens, including native antigens, toxins and self-antigens. We have developed a naive
VHH phage display library from 47 animals (11 camels, 13 alpacas and
23 llamas) with a size of 4.4 × 10⁹, along with our immunised
libraries to cater your requirements. Usually, we conduct two to four rounds of panning followed by screening of individual clones by ELISA to obtain high affinity binders.

1. Immune phage display library

We will immunise llamas against the antigen provided by customers and will deliver the phage display library generated from the immunised llamas in 9-11 weeks.

Flow chart: Immune phage display library

2. Immune phage display library, along with screening

We will immunise the llamas against the antigen provided by customers. Our deliverables will be unique clone sequences after screening the phage display library generated from the immunised llamas in 15-17 weeks, or the purified VHHs from the selected clones in 20-22 weeks.

Flow chart: Immune phage display library and deep sequencing

3. Naive library screening

See our research showcase about our naive VHH library project:

• 

  Showcase Llama antibody library for making new drugs

We have generated a naive VHH phage display library from 21 llamas and 2 camels. Our deliverables will be unique clone sequences selected from the naive llama or camel libraries in 5-6 weeks, or the purified VHHs from the selected clones in 4-8 weeks.

Flow chart: Naive library screening

4. Customized project

We can customise your project depending on your requirements or the desired output, starting from generating an immune phage display library, to affinity measurement of the identified binders.

5. Affinity measurement

We have an Octet Red96 platform for assessing the antibody affinity which utilizes biolayer interferometry for measuring macromolecular interactions. This is a label-free method used for kinetic analysis, quantification, and detection of molecular interactions in real time.

6. Deep sequencing

With the aid of our in-house MiSeq next-generation sequencing (NGS) techniques, we offer customers a high throughput analysis of the antibody repertoire of the libraries in terms of diversity and quality. This facilitates the process of phage display selections, clonal enrichment and identification of rare antibody sequences.

Which VHHs do we offer?

We offer many single domain antibodies from llamas, developed at our institute over the last three decades. These VHHs from llamas are produced in baker’s yeast and sold at 100 microgram to several mg quantities in unlabelled and biotinylated form. Especially a unique panel of foot-and-mouth disease virus (FMDV) and influenza A virus (IAV) binding VHHs are available. These are excellent reagents for quality control of vaccines. See our list of references below for more information on available VHHs.