../ pdb_000021ak_xyz-ext-atom_v1-2.xml.gz 08-May-2026 15:48 649K pdb_000021ak_xyz-no-atom_v1-2.xml.gz 08-May-2026 15:48 181K pdb_000021ak_xyz_v1-2.cif.gz 08-May-2026 15:48 738K pdb_000021ak_xyz_v1-2.xml.gz 08-May-2026 15:48 1M