MUC1 and familial pancreatic carcinoma: Tn-MUC1 glycopeptides derived from CHO-transfected cell lines [64], as well as MUC1 glycopeptides from pooled ascites fluid from patients with metastatic breast and pancreatic cancer [81], are processed and presented in both MHC class I and II molecules in DCs, supporting the ability of DCs to specifically initiate adaptive immunity to tumor-associated mucins.