selle tehnoloogia käigus kloneeritakse immunoglobuliini V-piirkonna geenid faagi, mille tulemusena tekib antikeha sarnane faag, mis ekspresseerib oma pinnal antigeene siduvaid piirkondi, A laboratory technique for the study of protein–protein, protein–peptide, and protein–DNA interactions that uses bacteriophages. In this technique, a gene encoding a protein of interest is inserted into a phage coat protein gene, causing the phage to "display" the protein on its outside while containing the gene for the protein on its inside