EPCAM and colorectal cancer: Thus, in the present study, transgenic plants expressing the antigen GA733 (an epithelial cell adhesion molecule (EpCAM) highly expressed in colorectal cancer cells) fused to Fc (GAP) [24,25,26], and the anti-colorectal cancer mAb CO17-1A recognizing the antigen GA733 (COP) [27,28,29,30,31,32] were crossed to express both the antigen and antibody in F1 plants.