For example, the high molecular weight tumor-associated glycoprotein, MUC1 (CD227) [21,22,23,24,25], has been used as a target for cancer immunotherapy studies in both mice [26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43] and in human clinical trials [44,45,46]. Here, MUC1 is linked to cancer.