| Code | Name | Deposits | Targets | Ligand Type |
|---|---|---|---|---|
| ACX | alpha-cyclodextrin (cyclohexa-amylose) | 1 | 1 | other |
| ACY | 1 | 1 | biological | |
| ADP | 1 | 1 | crystallization | |
| ALY | 1 | 1 | modified residue | |
| APR | adenosine-5-diphosphoribose | 1 | 1 | biological |
| ATP | adenosine-5'-triphosphate | 2 | 1 | other |
| AXP | 4-acetamido-2,4-didexoy-d-glycero-beta-d-galacto-octopy ranosylphosphonic acid (an axial phosphonate) | 1 | 1 | biological |
| BMA | beta-d-mannose | 1 | 1 | modified residue |
| bpa | unknown | 1 | 1 | crystallization |
| BTB | 2-[bis-(2-hydroxy-ethyl)-amino]-2-hydroxymethyl-propane-1,3-diol | 1 | 1 | other |
| BU1 | 1 | 1 | other | |
| CAF | s-dimethylarsinoyl-cysteine | 1 | 1 | modified residue |
| CD | Cadmium | 1 | 1 | biological |
| CEA | 1 | 1 | modified residue | |
| CEX | alpha-d-glucopyranosyl-(1->4)-alpha-d-glucopyranosyl-(1->4)-alpha-d-glucopyranosyl-(1->4)-alpha-d-glucopyranos yl-(1->4)-alpha-d-glucopyranose | 1 | 1 | biological |
| CIR | citrulline | 1 | 1 | biological |
| CIT | 1 | 1 | biological | |
| CIT | 1 | 1 | other | |
| CME | 1 | 1 | crystallization | |
| CMP | adenosine-3',5'-cyclic-monophosphate | 1 | 1 | biological |