sentences:  People who have the Le allele and who are non-secretors (homozygous for the nonfunctional se allele) will express the Le-a antigen in their bodily fluids and on their erythrocytes.If a person has both the Le and Se alleles, their exocrine cells will also have the enzyme fucosyltransferase 2 (FUT2).This adds fucose to the oligosaccharide precursor in a different position from the FUT3 enzyme.