FAPP presents many homologies with BSDL [172] and its cloning from human pancreatic tumor cells [170] indicates that the sequence of the N-terminal domain of FAPP is identical to that encoded by exons 1-10 of BSDL. The sequence that corresponds to exon 11 (which itself encodes the BSDL tandem repeats), however, is deleted by 330 bp and codes for six repeats. This evidence concerns the gene CEL and pancreatic neoplasm.