| Monomer | Residue | H-bonds | Interacting Atoms | Distances (Å) A B C D | |
| Residue | SAHA | ||||
| A, B, C, D | His142 | 1 | Nε2 | O1 | 2.5, 2.5, 2.5, 2.4 |
| His143 | 1 | Nε2 | O1 | 3.0, 2.8, 3.1, 3.1 | |
| Asp180 | 2 | Oδ2 Oδ1H | O1H O1 | 2.3, 2.1, 2.2, 2.4 2.0, 2.1, 2.0, 2.3 | |
| Asp268 | 2 | Oδ2H | O2, O1 | 2.9, 2.7, 2.9, 2.8 4.0, 4.0, 4.0, 3.9 | |
| Tyr312 | 1 | OH | O2 | 2.4, 2.4, 2.5, 2.6 | |
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| Total 7 |
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