| IPR036571 | 2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase superfamily | Homologous Superfamily |
| IPR026596 | Bifunctional enzyme IspD/IspF | Family |
| IPR018294 | 4-diphosphocytidyl-2C-methyl-D-erythritol synthase, conserved site | Conserved Site |
| IPR003526 | 2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase | Domain |
| IPR020555 | 2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase, conserved site | Conserved Site |
| IPR001228 | 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase | Family |
| IPR034683 | Cytidylyltransferase IspD/TarI | Family |
| IPR029044 | Nucleotide-diphospho-sugar transferases | Homologous Superfamily |