| Q9ZUB3 | n/a | 6o63 | PEG | A | 401 | e6o63A1 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |
| Q9ZUB3 | n/a | 6o63 | PEG | A | 401 | e6o63A2 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |
| Q9ZUB3 | n/a | 6o63 | PEG | B | 401 | e6o63B1 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |
| Q9ZUB3 | n/a | 6o63 | PEG | B | 401 | e6o63B2 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |
| Q9ZUB3 | n/a | 6o63 | PEG | C | 401 | e6o63C1 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |
| Q9ZUB3 | n/a | 6o63 | PEG | C | 401 | e6o63C2 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |
| Q9ZUB3 | n/a | 6o63 | PEG | D | 401 | e6o63D1 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |
| Q9ZUB3 | n/a | 6o63 | PEG | D | 401 | e6o63D2 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |
| Q9ZUB3 | n/a | 6o65 | PEG | E | 403 | e6o65E1 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |
| Q9ZUB3 | n/a | 6o65 | PEG | E | 403 | e6o65E2 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |
| Q9ZUB3 | n/a | 6o65 | PEG | G | 403 | e6o65G1 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |