Hexaprenyl diphosphate synthase

Hexaprenyl diphosphate synthase (previously known as trans-pentaprenyltranstransferase) may refer to:
 * Hexaprenyl diphosphate synthase (geranylgeranyl-diphosphate specific), enzyme
 * Hexaprenyl-diphosphate synthase ((2E,6E)-farnesyl-diphosphate specific), enzyme