| Q8II73 | DB00127 | 3b7p | SPM | A | 501 | e3b7pA2 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |
| Q8II73 | DB00127 | 3b7p | SPM | A | 501 | e3b7pA3 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |
| Q8II73 | DB00127 | 3b7p | SPM | B | 502 | e3b7pB2 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |
| Q8II73 | DB00127 | 3b7p | SPM | B | 502 | e3b7pB3 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |
| Q8II73 | DB00127 | 3b7p | SPM | C | 503 | e3b7pC2 | Rossmann-like | Rossmann-related | S-adenosyl-L-methionine-dependent methyltransferases | Spermine_synth |
| Q8II73 | DB00127 | 3b7p | SPM | C | 503 | e3b7pC3 | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermidine synthase tetramerisation domain | Spermine_synt_N |