../ pdb_00003s21_xyz-ext-atom_v1-2.xml.gz 08-Sep-2023 16:28 64K pdb_00003s21_xyz-no-atom_v1-2.xml.gz 08-Sep-2023 16:28 29K pdb_00003s21_xyz_v1-2.cif.gz 08-Sep-2023 16:28 151K pdb_00003s21_xyz_v1-2.xml.gz 08-Sep-2023 16:28 204K