geranylgeranyl-diphosphate geranylgeranyltransferase activity
geranylgeranyl-diphosphate geranylgeranyltransferase activity
geranylgeranyl-diphosphate:geranylgeranyl-diphosphate geranylgeranyltransferase (15-cis-phytoene-forming) activity
geranylgeranyl-diphosphate:geranylgeranyl-diphosphate geranylgeranyltransferase (15-cis-phytoene-forming) activity