AvantGen has constructed 30 human antibody libraries (Germliner™) with multiple human antibody germline frameworks which were selected based on their high stability, solubility and expression level.  Diversity is focused in the CDR regions and mimics the diversity of the natural human antibody repertoire for that variable region family, leaving framework sequences as fully human germline sequences. AvantGen’s proprietary libraries are comprised of >100 billion members, are well expressed and displayed with AvantGen’s yeast display system.

Coupled with AvantGen’s proprietary screening technologies, we can rapidly isolate fully human antibodies against not only the antigen, but also the epitope of interest and with other desired characteristics, such as high affinity (sub-nM to low nM), high specificity, and functional activity from the libraries within weeks.

Starting with the target of interest, AvantGen can perform a complete antibody discovery service. AvantGen will perform the screening, isolation, identification, and characterization of the novel antigen-positive antibody clones. The VH and Vκ/λ antibody fragments can be readily subcloned into the full-length IgG format of choice.

AvantGen can also produce antigens and develop and run functional assays to support the antibody discovery program.

The following is an example of human antibody clones isolated from AvantGen human antibody libraries with high affinity and functional blocking activity.

High affinity, functional antibodies isolated directly from the library

High affinity, functional antibodies isolated directly from the library

Human antibody clones that are able to recognize different isoforms, or different protein conformations, with species-cross reactivity can also be isolated readily from our large human antibody libraries, as shown in the following figure.

Selection for desired specificity and cross-reactivity

Selection for desired specificity and cross-reactivity