| D | SCAB-PH | e4cbgD2 | A: a/b three-layered sandwiches | X: Transmembrane heme-binding four-helical bundle | H: Anticodon-binding domain of Class II aaRS | T: Anticodon-binding domain of Class II aaRS | F: SCAB-PH | ECOD (v294.1) |
| D | MMS1_N | e4cbgD1 | A: a/b three-layered sandwiches | X: beta-propeller-like | H: beta-propeller | T: 7-bladed | F: MMS1_N | ECOD (v294.1) |
| C | SCAB-PH | e4cbgC1 | A: a/b three-layered sandwiches | X: Transmembrane heme-binding four-helical bundle | H: Anticodon-binding domain of Class II aaRS | T: Anticodon-binding domain of Class II aaRS | F: SCAB-PH | ECOD (v294.1) |
| C | MMS1_N | e4cbgC2 | A: a/b three-layered sandwiches | X: beta-propeller-like | H: beta-propeller | T: 7-bladed | F: MMS1_N | ECOD (v294.1) |
| B | | e4cbgB2 | A: a/b three-layered sandwiches | X: Transmembrane heme-binding four-helical bundle | H: P-loop domains-related | T: P-loop containing nucleoside triphosphate hydrolases | F: | ECOD (v294.1) |
| B | | e4cbgB1 | A: a/b three-layered sandwiches | X: P-loop domains-like | H: ARM repeat | T: ARM repeat | F: | ECOD (v294.1) |
| A | | e4cbgA2 | A: a/b three-layered sandwiches | X: Transmembrane heme-binding four-helical bundle | H: P-loop domains-related | T: P-loop containing nucleoside triphosphate hydrolases | F: | ECOD (v294.1) |
| A | | e4cbgA3 | A: a/b three-layered sandwiches | X: P-loop domains-like | H: ARM repeat | T: ARM repeat | F: | ECOD (v294.1) |