Gastrointestinal Cancer Gastrointestinal Cancer Human Carcinoembryonic Antigen (CEA) is a sensitive tumor biomarker for gastrointestinal cancer, and it is widely expressed in colorectal cancer (CRC) tissue and serum. Antibody Product Name Catalog Specificity Details Anti-Human Carcinoembryonic Antigen (CEA) Monoclonal Antibody Y62E54 Human CEACAM5 Check Out Protein Product Name Catalog Source Tag Details Human Carcinoembryonic Antigen (CEA) Protein, Fc Tag or Tag free A28K97 HEK Fc Check Out