antigen t ( thomsen-friedenreich ) , a precursor of blood group mn antigens , with the determinant of a carbohydrate ( gal-galnac ) , antigen lewisx ( lex ) , a trisaccharide found on type 2 blood group oligosaccharide chains , sialo-lex , the derivatives : of lex and lewisy ( ley ) , a difucosylated tetrasaccharide have , behaved as the oncodevelopment tumor-associated antigens in human colon .
C0041102
trisaccharide
C0028959
oligosaccharide