SERPINB5 and neoplasm: In the current study, we undertook a pairwisecomparison of the gene expression pattern between PDAC tumor and its adjacent normalpancreatic tissue from 45 patients and identified FN1 andSERPINB5, which encode fibronectin 1 (FN1) and serpin peptidase inhibitorB5 (Serpin B5, Maspin), respectively, as the key drug-targeting genes in developing noveltherapeutic agents for PDAC.