All-trans-nonaprenyl diphosphate synthase

All-trans-nonaprenyl diphosphate synthase (previously known as trans-octaprenyltranstransferase) may refer to:
 * All-trans-nonaprenyl diphosphate synthase (geranylgeranyl-diphosphate specific), enzyme
 * All-trans-nonaprenyl-diphosphate synthase (geranyl-diphosphate specific), enzyme