| A3MU81 | n/a | 7xif | TER | E | 302 | e7xifE1 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |
| A3MU81 | n/a | 7xif | TER | E | 302 | e7xifE2 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |
| A3MU81 | n/a | 7xif | TER | F | 302 | e7xifF1 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |
| A3MU81 | n/a | 7xif | TER | F | 302 | e7xifF2 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |
| A3MU81 | n/a | 7xif | TER | G | 302 | e7xifG1 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |
| A3MU81 | n/a | 7xif | TER | G | 302 | e7xifG2 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |