| O28126 | DB03814 | 4x4r | MES | A | 503 | e4x4rA1 | Nucleotidyltransferase-like | Nucleotidyltransferase | Nucleotidyltransferase | NTP_transf_2 |
| O28126 | DB03814 | 4x4r | MES | A | 503 | e4x4rA2 | Alpha-beta plaits | PAP/Archaeal CCA-adding enzyme, C-terminal domain | PAP/Archaeal CCA-adding enzyme, C-terminal domain | CAA_C |
| O28126 | DB03814 | 4x4v | MES | A | 505 | e4x4vA1 | Nucleotidyltransferase-like | Nucleotidyltransferase | Nucleotidyltransferase | NTP_transf_2 |
| O28126 | DB03814 | 4x4v | MES | A | 505 | e4x4vA2 | Alpha-beta plaits | PAP/Archaeal CCA-adding enzyme, C-terminal domain | PAP/Archaeal CCA-adding enzyme, C-terminal domain | CAA_C |