| P19623 | n/a | 3rw9 | DSH | A | 303 | e3rw9A2 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |
| P19623 | n/a | 3rw9 | DSH | A | 303 | e3rw9A3 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |
| P19623 | n/a | 3rw9 | DSH | B | 303 | e3rw9B2 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |
| P19623 | n/a | 3rw9 | DSH | B | 303 | e3rw9B3 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |