MUC5AC and pancreatic neoplasm: There is preliminary evidence that MUC5AC is immunogenic, and the cytotoxic T lymphocytes (CTLs) are stimulated by it (peptides such as MUC5AC-A02-1398 [FLNDAGACV] and MUC5AC-A24-716 [TCQPTCRSL]) can kill the pancreatic tumor cells and have the potential to be harnessed for vaccine development [32].