IHC shows membrane staining in paraffin-embedded human pancreatic cancer. Anti-CLDN1 antibody was used at 1/250 dilution, followed by a Goat Anti-Rabbit IgG H&L (HRP) ready to use. Counterstained with hematoxylin. Heat mediated antigen retrieval with Tris/EDTA buffer pH9.0 was performed before...