../ pdb_00001ckk_xyz-ext-atom_v1-4.xml.gz 22-Dec-2023 16:55 1M pdb_00001ckk_xyz-no-atom_v1-4.xml.gz 22-Dec-2023 16:55 34K pdb_00001ckk_xyz_v1-4.cif.gz 22-Dec-2023 16:55 2M pdb_00001ckk_xyz_v1-4.xml.gz 22-Dec-2023 16:55 2M