The target cells used in this assay were the colon cancer cell lines SW620 (HLA-A∗0201+, MTA1+) and HT-29 (HLA-A2−, MTA1+) and the breast cancer cell line MDA-MB-231 (HLA-A∗0201+, MTA1+). The gene discussed is MTA1; the disease is colonic neoplasm.