Thanks to its expertise, ProteoGenix is able to provide you with diverse high-quality naïve libraries generated through our unique platform of antibody library generation for phage display applications. Our libraries contain a vast repertoire of antibodies in many formats (scFv, Fab, or even VHH) and from many different species.

ProteoGenix can adapt to each of your projects to achieve your
goals in the shortest possible time:

  • Huge naive libraries
  • 6-7 weeks
  • Starting from 8 900€

Advantages of using a naive library

Library Format Species Size (clones)
scFv Human – Donors that recovered from COVID-19 – Ideal for COVID-19 antibody generation 1.19 X 1010
LiAb-SFMAXTM scFv & Fab Human – 5 different ethnic groups – 368 donors 5.37 X 1010
LiAb-SFaTM scFv Human 1.5 X 109
LiAb-FabTM Fab Human 2.00 X 1010
VHH Camel, llama, alpaca – 57 animals – Ideal for nanobody generation 1.51 X 1010
LiAb-SFRabTM scFv & Fab Rabbit – 4 different breeds for maximized diversity 1.00 X 109
LiPep-12 Peptide 12-mer / 1.00 X 109
LiPep-7 Peptide 7-mer / 1.00 X 109

We have more libraries in scFv format because they are genetically more stable than the Fab format.
But the advantage of the Fab format is that it is possible to select in a more simple way the binders (by avoiding the risk of formation of dimers or trimers).

More libraries of other species may be available upon request.

Screening from a naive library

A screening of the chosen library is carried out by ELISA in order to identify high-affinity binders of the protein of interest. During the interaction between the binders and the protein, binders will remain attached to the well while non-binders will be eliminated by washing.

Binders are eluted and then recovered to infect bacteria (with a helper phage) and increase their quantity. The repetition of this method is called « panning » (or also called « biopanning ») and allows to select the best binders, which are then isolated for validation in ELISA.

At the end, the DNA of the best binders is sequenced thereby allowing to produce them as recombinant proteins. ProteoGenix generally performs 3 to 5 steps of panning to ensure you get the best possible candidates.

Example of panning (biopanning) protocol
Example of panning (biopanning) protocol in Phage display. 1 - Incubation with phage library 2 - Wash away non-binders 3 - Elution of binders 4 - 3 to 5 rounds of panning/biopanning process 5 - ELISA to determine specificity of binding after 3-5 rounds of biopanning

All the sequences can be provided to the customer. ProteoGenix guarantees 3 to 10 binders but it is possible to supply more binders according to the requests of our customers. Affinity maturation can then be performed with the best binders if necessary.

For more information or to get a quote for our phage display services with the use of naive libraries, please contact us.