Among highly relevant TACAs, the Tn antigen (GalNAcα1-O-Ser/Thr/Tyr, Figure 1) and its sialylated version of the Tn antigen (STn, Neu5Acα2-6GalNAcα1-O-Ser/Thr, Figure 1) are widely expressed in a majority of human carcinomas originated from gastrointestines, pancreas, lung, breast, prostate, bladder, and ovary [13,14]. The gene discussed is EEF1A2; the disease is carcinoma.