The amount of a 4-galactosyl-N-acetylglucosaminide 3-alpha-L-fucosyltransferase 9 when measured in blood serum. The trait is OBA_2044485 (level of 4-galactosyl-N-acetylglucosaminide 3-alpha-L-fucosyltransferase 9 in blood serum). Also known as: blood serum 4-galactosyl-N-acetylglucosaminide 3-alpha-L-fucosyltransferase 9 amount.