| Q8ECH6 | n/a | 7bxo | ANP | A | 201 | e7bxoC1 | Four-helical up-and-down bundle | HEPN | Nucleotidyltransferase substrate binding subunit/domain | HepT-like |
| Q8ECH6 | n/a | 7bxo | ANP | A | 201 | e7bxoD1 | Four-helical up-and-down bundle | HEPN | Nucleotidyltransferase substrate binding subunit/domain | HepT-like |
| Q8ECH6 | n/a | 7bxo | ANP | A | 201 | e7bxoH1 | Four-helical up-and-down bundle | HEPN | Nucleotidyltransferase substrate binding subunit/domain | HepT-like |
| Q8ECH6 | n/a | 7bxo | ANP | E | 201 | e7bxoD1 | Four-helical up-and-down bundle | HEPN | Nucleotidyltransferase substrate binding subunit/domain | HepT-like |
| Q8ECH6 | n/a | 7bxo | ANP | E | 201 | e7bxoG1 | Four-helical up-and-down bundle | HEPN | Nucleotidyltransferase substrate binding subunit/domain | HepT-like |
| Q8ECH6 | n/a | 7bxo | ANP | E | 201 | e7bxoH1 | Four-helical up-and-down bundle | HEPN | Nucleotidyltransferase substrate binding subunit/domain | HepT-like |