AcceGen has developed the proprietary Cell Immortalization Service for research application. Primary cells usually stop proliferating, aging and death after a limited number of cell passages. This limits the further application of cell culture techniques. The immortalized cells are derived from primary cells, and the exogenous immortalized genes are introduced into the target cells by gene transfection techniques, thereby establishing an immortalized cell line to achieve the cells cultured in vitro. The purpose of unlimited proliferation and no difference between cells.