| B | Diphthamide_syn_3rd | e6bxoB1 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Iron-sulphur enzyme Dph2 | F: Diphthamide_syn_3rd | ECOD (1.6) |
| B | Diphthamide_syn_2nd | e6bxoB2 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Iron-sulphur enzyme Dph2 | F: Diphthamide_syn_2nd | ECOD (1.6) |
| B | Diphthamide_syn_1st | e6bxoB3 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Iron-sulphur enzyme Dph2 | F: Diphthamide_syn_1st | ECOD (1.6) |
| A | Diphthamide_syn_3rd | e6bxoA1 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Iron-sulphur enzyme Dph2 | F: Diphthamide_syn_3rd | ECOD (1.6) |
| A | Diphthamide_syn_2nd | e6bxoA2 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Iron-sulphur enzyme Dph2 | F: Diphthamide_syn_2nd | ECOD (1.6) |
| A | Diphthamide_syn_1st | e6bxoA3 | A: a/b three-layered sandwiches | X: Flavodoxin-like | H: Class I glutamine amidotransferase-like | T: Iron-sulphur enzyme Dph2 | F: Diphthamide_syn_1st | ECOD (1.6) |