Reaction catalyzed by fucose-1-phosphate guanylyltransferase (2.7.7.30)

		+			=			+
	2-amino-6-chloropurine-beta-D-riboside 5'-triphosphate	+		L-fucose 1-phosphate	=		diphosphate	+		2-amino-6-chloropurine-beta-D-riboside 5'-(alpha-L-fucosyl)diphosphate