Geranylgeraniol 18-hydroxylase (EC 1.14.13.110, GGOH-18-hydroxylase) is an enzyme with systematic name geranylgeraniol,NADPH:oxygen oxidoreductase (18-hydroxylating).[1] This enzyme catalyses the following chemical reaction
Geranylgeraniol 18-hydroxylase is a heme-thiolate protein (P-450).