Reaction catalyzed by 2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase (4.6.1.12)

		=			+
	2-phospho-4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol	=		2-C-methyl-D-erythritol 2,4-cyclodiphosphate	+		CMP