the killing activity of ctl at 20∶1 ratio of effective cells to target cells was more than 75% to tumor cells, 35%-45% to homologous cell line and weaker to other germ cell line (p0.01).
其活化的ctl在20∶1效靶比时对抗原来源细胞株自身的杀伤率达75%以上,对同系细胞株的杀伤活性为35%-45%,对其它种系肿瘤细胞仅有微弱杀伤力(p0.01)。