| ID | Description | N° of binding sites | Bound to chains |
|---|---|---|---|
| 2 | 5'-{[(3S)-3-amino-3-carboxypropyl](2-chloroethyl)amino}-5'-deoxyadenosine | 3 (3 molecules) | A, B, D [auth A,B,C] |
| 4 | S-adenosyl-L-homocysteine | 1 (1 molecule) | C [auth D] |