| B [auth K] | Flu_PB1_2nd | e6qwlK2 | A: alpha bundles | X: helical bundle domain in reverse transcriptase-like polymerases (From Topology) | H: helical bundle domain in reverse transcriptase-like polymerases (From Topology) | T: helical bundle domain in reverse transcriptase-like polymerases | F: Flu_PB1_2nd | ECOD (1.6) |
| B [auth K] | Flu_PB1_1st | e6qwlK1 | A: a+b two layers | X: Alpha-beta plaits | H: Adenylyl and guanylyl cyclase catalytic domain-like | T: Adenylyl and guanylyl cyclase catalytic domain-like | F: Flu_PB1_1st | ECOD (1.6) |
| C [auth Q] | Flu_PB2_2nd | e6qwlQ2 | A: a+b two layers | X: a+b domain in PB2 (From Topology) | H: a+b domain in PB2 (From Topology) | T: a+b domain in PB2 | F: Flu_PB2_2nd | ECOD (1.6) |
| C [auth Q] | Flu_PB2_3rd | e6qwlQ1 | A: a+b complex topology | X: Middle domain in PB2 (From Topology) | H: Middle domain in PB2 (From Topology) | T: Middle domain in PB2 | F: Flu_PB2_3rd | ECOD (1.6) |