Fig. 1

Representative immunohistochemical staining images of tissue sections stained with anti-CEACAM5, anti-TMPRSS4, anti-COL17A1, anti-CLDN18, and anti-AQP5. Scale bars represent 500 μm. HE: hematoxylin and eosin staining. Tissue types: PDAC: pancreatic ductal adenocarcinoma, Panc: pancreas, CP: chronic pancreatitis, Duo: duodenal tissue, Liver: liver tissue.