4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase activity (ferredoxin)
4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase activity (ferredoxin)
1-hydroxy-2-methyl-2-butenyl 4-diphosphate synthase activity
1-hydroxy-2-methyl-2-butenyl 4-diphosphate synthase activity