5.3.3.2	metabolism	IPP isomerase activity is a rate-limiting step in terpenoid synthesis	727103	
5.3.3.2	metabolism	the enzyme plays a critical role in terpenoid metabolic pathways	748714	
5.3.3.2	metabolism	the plastidial enzyme plays an important function in carotenoid biosynthesis	748953	
5.3.3.2	physiological function	involved in terpenoid metabolism	706809	
5.3.3.2	physiological function	isopentenyl diphosphate and dimethylallyl diphosphate are essential precursors for terpenoid biosynthesis	706249