FUT4 and cancer: Vocadloand co-workers studied the inhibitionof LeX and sLeX creation by FTIII and FTVIIin HL-60 and HepG2 cancer cells using the previously reported compound 18 (5-thio-fucose, 5T-Fuc, Figure  and Table ). This compound is takenup by cancer cells, and it is metabolically converted into the correspondingnucleotide derivative 19 (GDP-5T-Fuc).