Term Name:	hydroxymethylbutenyl pyrophosphate reductase activity
Synonyms:	(E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate reductase (IPP and DMAPP forming)
Definition:	Catalysis of the formation of both isopentenyl pyrophosphate and dimethylallyl pyrophosphate from (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate.
Ontology:	GO: Molecular Function [GO:0042380]    QuickGO    AmiGO