Functional Information from PDB Data
| site_id | AC1 |
| Number of Residues | 14 |
| Details | binding site for residue SAH A 401 |
| Chain | Residue |
| A | PHE69 |
| A | PHE150 |
| A | ILE151 |
| A | GLU152 |
| A | ASN173 |
| A | VAL175 |
| A | TYR70 |
| A | GLY71 |
| A | GLY91 |
| A | CYS92 |
| A | ASP115 |
| A | MET116 |
| A | GLN120 |
| A | GLY149 |
| site_id | AC2 |
| Number of Residues | 3 |
| Details | binding site for residue ARS A 402 |
| Chain | Residue |
| A | CYS44 |
| A | CYS174 |
| A | CYS224 |
| site_id | AC3 |
| Number of Residues | 13 |
| Details | binding site for residue SAH B 401 |
| Chain | Residue |
| B | PHE69 |
| B | TYR70 |
| B | GLY71 |
| B | GLY91 |
| B | ASP115 |
| B | MET116 |
| B | LEU117 |
| B | GLN120 |
| B | GLY149 |
| B | ILE151 |
| B | GLU152 |
| B | ASN173 |
| B | LEU178 |
| site_id | AC4 |
| Number of Residues | 4 |
| Details | binding site for residue ARS B 402 |
| Chain | Residue |
| B | CYS44 |
| B | TYR70 |
| B | CYS174 |
| B | CYS224 |
