Members of this family are component II of the heterodimeric heptaprenyl diphosphate synthase. The trusted cutoff was set such that all members identified are encoded near to a recognizable gene for component I (in pfam07307). This enzyme acts in menaquinone-7 isoprenoid side chain biosynthesis. [Biosynthesis of cofactors, prosthetic groups, and carriers, Menaquinone and ubiquinone]
Jiyao W et al.(2023). "The conserved domain database in 2023.",