Experimental Design: CD55-high and CD55-low population was sorted from breast cancer cell line, injected into immunodeficient mice, and the resultant tumor volume was measured.

• 实验设计：从乳腺癌细胞系中分离出CD55高表达和低表达的细胞群体，注射入免疫缺陷的大鼠体内，测量产生的肿瘤体积。