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双特异性单克隆抗体（BsAb）是在单克隆抗体（mAb）基础上研制成的一种新型抗体，其特点是一个BsAb分子可同时识别两种不同的抗原决定簇。采用BsAb再导向效应细胞治疗肿瘤，是近年来较有希望的一种特异性免疫疗法〔１〕。另外，也可用于免疫学检测和基础研究，实用性强。BsAb的
Bispecific monoclonal antibody (BsAb) is a new antibody developed on the basis of monoclonal antibody (mAb), which is characterized by a BsAb molecule that recognizes two different epitopes simultaneously. The use of BsAb redirecting effector cells to treat tumors is a more promising immunotherapy in recent years [1]. In addition, can also be used for immunological detection and basic research, practicality. BsAb’s