UNG and pancreatic neoplasm: As for the second rule, candidate peptides CSGFQPMRYPFQDPYHGYGW and CSGADFVTYATRRVQFMMHK derived from uracil-DNA glycosylase isoform UNG2, T-cell surface glycoprotein CD5 isoform 2, and transmembrane protein 33, N-acetylgalactosamine kinase isoform X10 contribute to the identification of pancreatic cancer.