What is "dimethylallyltranstransferase"

Dimethylallyltranstransferase is an enzyme that converts dimethylallylpyrophosphate and isopentenyl pyrophosphate into farnesylpyrophosphate. It is also referred to as farnesylpyrophosphate synthase or farnesyldiphosphate synthase.

Pyrophosphate is also involved, as both a reactant and a product. Geranylpyrophosphate is created in an intermediate step.