Members of this family all are from cyanobacteria or plastid-containing eukaryotes. A member from Arabidopsis (where both plastoquinone and ubiquinone contain the C(45) prenyl moiety) was characterized by heterologous expression as a solanesyl diphosphate synthase. [Biosynthesis of cofactors, prosthetic groups, and carriers, Menaquinone and ubiquinone]
Jiyao W et al.(2023). "The conserved domain database in 2023.",