ID   2.5.1.82
DE   Hexaprenyl diphosphate synthase (geranylgeranyl-diphosphate specific).
AN   (All-trans)-hexaprenyl-diphosphate synthase.
CA   Geranylgeranyl diphosphate + 2 isopentenyl diphosphate = 2 diphosphate +
CA   all-trans-hexaprenyl diphosphate.
CF   Mg(2+).
CC   -!- The enzyme prefers geranylgeranyl diphosphate to farnesyl diphosphate
CC       as an allylic substrate and does not show activity for geranyl
CC       diphosphate and dimethylallyl diphosphate.
CC   -!- Formerly EC 2.5.1.33.
DR   Q97W92, HEXPP_SACS2;
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