Additionally, anti-Neu5Ac-Lea (Fig. 13C) and anti-Neu5Ac-Lex (Fig. 13D) antibodies were mainly bound to the fraction obtained from pooled tumor pancreatic tissue (Fig. 13, C and D, lanes 1 and 2), indicating higher amounts of sialyl-Lea (sLea) and sialyl-Lex (sLex) pentaosylceramides. Here, FUT4 is linked to neoplasm.