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Direct protein interaction

Phase I – Immunization 
You have the choice between dromedary and lama. The dromedary provides more sequence variability and better stability.

Standard immunization (each two weeks) or Rapid immunization (each week).

This step is done in collaboration with our partner Dromelys ( for more information

Antigens : protein, peptide, Toxins, chemical molecules, cells, cell membrane.

Protocol of immunization and recovery :

After seven injections, peripheral blood lymphocytes (PBLs) of the immunized dromedary or Llama were isolated and used to construct the library.

Phase II – Lymphocyte isolation, cDNA preparation, Amplification and phage library
cDNA is generated via RNA isolation, amplified via PCR, and a diverse phage library is generated for screening against the antigen.

Total RNA was isolated from PBLs . To avoid contamination with VH genes, the variable regions of heavy-chain immunoglobulins (VHH) were amplified by nested PCR.  The VHH was extracted from the gel. The amplified second PCR products were digested with Pst I and Not I restriction enzymes, then inserted into the phagemid. Ligation products were transformed into Escherichia coli TG1 cells by electroporation. Many clones were selected randomly and used to estimate the percentage of clones with a proper insert size within library.

Phase III – Antibody Screening
The phage library will be screened by yeast two hybrid .

Phase IV – Production
We express the final antibody in a protein expression system. The desired quantity of antibody is produced and purified.

– In the case of unit non-response, we will re-inject the antigen (no additional charges).

– You are the only onwner of intellectual proprety