Jurkat cells expressing MC.7.G5, MC.27.759S, K8T-1, or K8T-2 TCRs responded to MR1*01 homozygous or MR1*01/*02 cancer cell lines but, collectively, did not respond to monocytes or B cells from sixteen different healthy donors (Figure 2, F and G and Figure 6). Here, MR1 is linked to cancer.