(2E,6E)-farnesyl-diphosphate:isopentenyl-diphosphate farnesyltranstransferase

(2E,6E)-farnesyl-diphosphate:isopentenyl-diphosphate farnesyltranstransferase may refer to:
 * Hexaprenyl-diphosphate synthase ((2E,6E)-farnesyl-diphosphate specific), an enzyme
 * All-trans-octaprenyl-diphosphate synthase, an enzyme
 * All-trans-decaprenyl-diphosphate synthase, an enzyme