FN1 and familial pancreatic carcinoma: In order to investigate the pathways involved in the adhesive behavior of pancreatic cancer cells on TNC and/or on FN substrates, the phosphorylation level of paxillin at Tyr 118, an early step in integrin mediated signaling, as well as the phosphorylation level of Akt at Ser 473 and the expression levels of vinculin, a protein involved in the connection of focal adhesions to the actin cytoskeleton, were analyzed by immunoblotting.