../ pdb_00003u21_xyz-ext-atom_v1-4.xml.gz 17-Oct-2025 15:22 40K pdb_00003u21_xyz-no-atom_v1-4.xml.gz 17-Oct-2025 15:22 26K pdb_00003u21_xyz_v1-4.cif.gz 17-Oct-2025 15:22 103K pdb_00003u21_xyz_v1-4.xml.gz 17-Oct-2025 15:22 140K