| D | PK_2nd | e6su2D1 | A: beta barrels | X: cradle loop barrel | H: RIFT-related | T: PK beta-barrel domain-like | F: PK_2nd | ECOD (1.6) |
| D | PK_1st | e6su2D3 | A: a/b barrels | X: TIM beta/alpha-barrel | H: TIM barrels (From Topology) | T: TIM barrels | F: PK_1st | ECOD (1.6) |
| D | PK_C | e6su2D2 | A: a/b three-layered sandwiches | X: PK C-terminal domain-like (From Topology) | H: PK C-terminal domain-like (From Topology) | T: PK C-terminal domain-like | F: PK_C | ECOD (1.6) |
| C | PK_2nd | e6su2C2 | A: beta barrels | X: cradle loop barrel | H: RIFT-related | T: PK beta-barrel domain-like | F: PK_2nd | ECOD (1.6) |
| C | PK_1st | e6su2C3 | A: a/b barrels | X: TIM beta/alpha-barrel | H: TIM barrels (From Topology) | T: TIM barrels | F: PK_1st | ECOD (1.6) |
| C | PK_C | e6su2C1 | A: a/b three-layered sandwiches | X: PK C-terminal domain-like (From Topology) | H: PK C-terminal domain-like (From Topology) | T: PK C-terminal domain-like | F: PK_C | ECOD (1.6) |
| B | PK_2nd | e6su2B1 | A: beta barrels | X: cradle loop barrel | H: RIFT-related | T: PK beta-barrel domain-like | F: PK_2nd | ECOD (1.6) |
| B | PK_1st | e6su2B3 | A: a/b barrels | X: TIM beta/alpha-barrel | H: TIM barrels (From Topology) | T: TIM barrels | F: PK_1st | ECOD (1.6) |
| B | PK_C | e6su2B2 | A: a/b three-layered sandwiches | X: PK C-terminal domain-like (From Topology) | H: PK C-terminal domain-like (From Topology) | T: PK C-terminal domain-like | F: PK_C | ECOD (1.6) |
| A | PK_2nd | e6su2A1 | A: beta barrels | X: cradle loop barrel | H: RIFT-related | T: PK beta-barrel domain-like | F: PK_2nd | ECOD (1.6) |
| A | PK_1st | e6su2A2 | A: a/b barrels | X: TIM beta/alpha-barrel | H: TIM barrels (From Topology) | T: TIM barrels | F: PK_1st | ECOD (1.6) |
| A | PK_C | e6su2A3 | A: a/b three-layered sandwiches | X: PK C-terminal domain-like (From Topology) | H: PK C-terminal domain-like (From Topology) | T: PK C-terminal domain-like | F: PK_C | ECOD (1.6) |