MUC5AC and gastric neoplasm: The mucins tested were isolated from rhesus monkey normal gastric mucosa (Leb negative (-), SLex positive (+), LacdiNAc−), human gastric tumor mucosa (Leb+, SLex+, LacdiNAc+, sulfate+), and human gastric normal mucosa (Leb+, SLex-, LacdiNAc+) to provide an array of glycan structures (Table 2).