The result shows thatthe imrnunoconjugate ~(125)I-3A_1 mainly concentrated,in tumor area in CEM tumor-bea-ring nude mice.

• 96小时后处死裸鼠,测定肿瘤及各器官中的放射性分布,结果表明 McAb 3A_1在 CEM 荷瘤裸鼠的肿瘤组织中有特异性的浓集。