| KEGG ID | KO | Definition |
| alv:Alvin_1078 | K05895 | precorrin-6x reductase |
| tvi:Thivi_1680 | K05895 | precorrin-6A reductase |
| mpur:MARPU_06155 | K05895 | cobalt-precorrin-6x reductase |
| rru:Rru_A2988 | K05895 | precorrin-6A reductase |
| rrf:F11_15305 | K05895 | precorrin-6A reductase |
| mag:amb2641 | K05895 | Precorrin-6x reductase |
| mgy:MGMSRv2__2798 | K05895 | Precorrin-6A reductase |
| magx:XM1_3454 | K05895 | Precorrin-6A reductase |
| magn:WV31_06055 | K05895 | cobalt-precorrin-6A reductase |