| D [auth C] | DNA_topoisoIV_1st | e6qtkC3 | A: alpha arrays | X: HTH | H: HTH | T: winged | F: DNA_topoisoIV_1st | ECOD (1.6) |
| D [auth C] | DNA_topoisoIV_3rd | e6qtkC1 | A: alpha bundles | X: alpha-helical domain in type II DNA topoisomerase (From Topology) | H: alpha-helical domain in type II DNA topoisomerase (From Topology) | T: alpha-helical domain in type II DNA topoisomerase | F: DNA_topoisoIV_3rd | ECOD (1.6) |
| D [auth C] | DNA_topoisoIV_2nd_1 | e6qtkC2 | A: a+b two layers | X: a+b domain in type II DNA topoisomerase (From Topology) | H: a+b domain in type II DNA topoisomerase (From Topology) | T: a+b domain in type II DNA topoisomerase | F: DNA_topoisoIV_2nd_1 | ECOD (1.6) |
| B [auth A] | DNA_topoisoIV_1st | e6qtkA2 | A: alpha arrays | X: HTH | H: HTH | T: winged | F: DNA_topoisoIV_1st | ECOD (1.6) |
| B [auth A] | DNA_topoisoIV_3rd | e6qtkA3 | A: alpha bundles | X: alpha-helical domain in type II DNA topoisomerase (From Topology) | H: alpha-helical domain in type II DNA topoisomerase (From Topology) | T: alpha-helical domain in type II DNA topoisomerase | F: DNA_topoisoIV_3rd | ECOD (1.6) |
| B [auth A] | DNA_topoisoIV_2nd_1 | e6qtkA1 | A: a+b two layers | X: a+b domain in type II DNA topoisomerase (From Topology) | H: a+b domain in type II DNA topoisomerase (From Topology) | T: a+b domain in type II DNA topoisomerase | F: DNA_topoisoIV_2nd_1 | ECOD (1.6) |
| C [auth D] | DNA_gyraseB_C | e6qtkD1 | A: a/b three-layered sandwiches | X: HAD domain-like | H: HAD domain-related | T: Toprim domain | F: DNA_gyraseB_C | ECOD (1.6) |
| A [auth B] | DNA_gyraseB_C | e6qtkB1 | A: a/b three-layered sandwiches | X: HAD domain-like | H: HAD domain-related | T: Toprim domain | F: DNA_gyraseB_C | ECOD (1.6) |