../ pdb_00001u21_xyz-ext-atom_v1-3.xml.gz 18-Aug-2023 15:48 43K pdb_00001u21_xyz-no-atom_v1-3.xml.gz 18-Aug-2023 15:48 23K pdb_00001u21_xyz_v1-3.cif.gz 18-Aug-2023 15:48 60K pdb_00001u21_xyz_v1-3.xml.gz 18-Aug-2023 15:48 81K