Aprilbio Co. Ltd. develops long-action proteins and antibody drugs. It produces long-acting protein drugs using human Fab antibody fragments that bind specifically to serum albumin, and a Ex-12 helper phage antibody library to isolate human Fab antibodies with desired binding specificity. The firm's technology includes Serum Albumin Fab Associated technology and Human monoclonal antibody production technology. The company was founded by Sang-Hoon Cha on February 12, 2013 and is headquartered in Chuncheon-si, South Korea.