Enzymatic synthesis of a blood group A related, difucosyl heptaglycosylceramide with a type 2 carbohydrate chain

The presence of an α1→3 fucosyltransferase in the serum of an A 1 Rh(−) Le(a−b+) Fy(a−b+) Jk(a+b+)K(−)M(−)N(+)S(−)s(+)P 1 (+) human secretor was shown, capable of converting a blood group A active hexaglycosylceramide with a type 2 carbohydrate chain into the corresponding difucosyl compound under in vitro conditions.