Objective: To express Fab fragments of the anti colonic cancer antibody and to compare the antigen binding characteristics between the expressing product and the authentic monoclonal antibody.

• 目的：在大肠杆菌中表达抗结肠癌抗体Fab片段，比较表达产物和原杂交瘤单克隆抗体的抗原结合特性。