| B8BDQ4 | TOP6B_ORYSI | Oryza sativa subsp. indica (Rice) | TOP6B OsI_30680 | Detail |
| O27088 | TOP6B_METTH | Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H) (Methanobacterium thermoautotrophicum) | top6B MTH_1007 | Detail |
| P38893 | YH10_YEAST | Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast) | YHR210C | Detail |
| A4YHK7 | TOP6B_METS5 | Metallosphaera sedula (strain ATCC 51363 / DSM 5348 / JCM 9185 / NBRC 15509 / TH2) | top6B Msed_1754 | Detail |
| Q12WQ0 | TOP6B_METBU | Methanococcoides burtonii (strain DSM 6242 / NBRC 107633 / OCM 468 / ACE-M) | top6B Mbur_1203 | Detail |
| O29605 | TOP6B_ARCFU | Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126) | top6B AF_0652 | Detail |
| O59209 | TOP6A_PYRHO | Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3) | top6A PH1563 | Detail |
| Q9V134 | TOP6A_PYRAB | Pyrococcus abyssi (strain GE5 / Orsay) | top6A PYRAB05950 PAB2411 | Detail |
| Q9HR32 | TOP6A_HALSA | Halobacterium salinarum (strain ATCC 700922 / JCM 11081 / NRC-1) (Halobacterium halobium) | top6A VNG_0884G | Detail |
| P15348 | TOP2_DROME | Drosophila melanogaster (Fruit fly) | Top2 CG10223 | Detail |