Abstract Recombinant antibody cloning and phage display technologies proved to be very efficient in producing single-chain antibodies (scFv), against antigen of interest which is MCF-7 breast cancer cell line. The main objectives of this study are to construct single chain variable fragment (scFv) towards MCF-7 breast cancer cells and to characterize scFv antibodies that interacts with MCF-7 breast cancer cells line. In the methods: phage display technologies were used to produce single-chain antibodies (scFv) against (MCF-7) breast carcinoma cell line. The starting material was the mouse B...