传统的免疫球蛋白只能结合单一特异性的抗原分子 ,而双特异性抗体的两个抗原结合位点具有不同的特异性 ,能够结合不同的抗原分子。双特异性抗体在生物医学领域特别是在肿瘤免疫治疗方面已取得了较大成就。鉴于用传统的方法很难大量制备符合临床要求的双特异性抗体 ,近年来 ,双 Conventional immunoglobulins bind only to a single specific antigen molecule, whereas the two antigen-binding sites of a bispecific antibody have different specificities and are capable of binding to different antigen molecules. Bispecific antibodies have made great achievements in the field of biomedicine, especially in the field of tumor immunotherapy. In view of the traditional method is difficult to mass preparation of bispecific antibodies in line with clinical requirements, in recent years, double