. . . . . . . . "Unable to sulfate the sialyl Lewis X tetrasaccharide." . "428"^^ . . "428"^^ . . "Mutagenesis site occurs in NX_Q9Y4C5-2 at amino acids 428 - 428." . . . . . "neXtProt gold" . . . . . . . . . "2014-09-19T00:00:00.0Z"^^ . . . "neXtProt database" . "CALIPHO project" . . . . . "2" . . .