AIM: To construct a universal expression vector for human-mouse chimeric Fab antibody and to use it for construction and expression of human-mouse chimeric Fab antibody against human hepatoma associated antigen HAb18G.

• 目的:构建一个在大肠杆菌中表达人鼠嵌合Fab抗体的通用载体；并用于抗人肝癌相关抗原HAb18G人鼠嵌合Fab抗体的表达.