Data items in the IHM_LIGAND_PROBE category identifies non-polymeric entities (ligands) that are used as probes.
loop_ _ihm_ligand_probe.probe_id _ihm_ligand_probe.entity_id _ihm_ligand_probe.dataset_list_id _ihm_ligand_probe.details 1 3 1 ? 2 4 1 ? # ... abbreviated ...