passages.id: split_4_test_1851_passage
passages.type: progene_text
passages.text: In situ hybridization with DIG - tailed oligonucleotides was performed on sections of paraffin - embedded tissues of stone - containing intrahepatic bile ducts , cholangiocarcinomas , and normal controls to identify the expression of MUC2 , MUC3 , MUC4 , MUC5B , and MUC5AC in nonneoplastic and neoplastic biliary epithelium .