. "Catalyzes the phosphorylation of the position 2 hydroxy group of 4-diphosphocytidyl-2C-methyl-D-erythritol. Phosphorylates isopentenyl phosphate at low rates. Also acts on isopentenol, and, much less efficiently, dimethylallyl alcohol. Dimethylallyl monophosphate does not serve as a substrate." .