Term Name:	hexaprenyl diphosphate synthase (geranylgeranyl-diphosphate specific) activity
Synonyms:	(all-E) hexaprenyl diphosphate synthase activity, (all-trans)-hexaprenyl-diphosphate synthase activity
Definition:	Catalysis of the reaction: 2 isopentenyl diphosphate + (2E,6E,10E)-geranylgeranyl diphosphate = all-trans-hexaprenyl diphosphate + 2 diphosphate.
Ontology:	GO: Molecular Function [GO:0052922]    QuickGO    AmiGO