../ pdb_000021zx_xyz-ext-atom_v1-1.xml.gz 31-Jul-2026 16:01 280K pdb_000021zx_xyz-no-atom_v1-1.xml.gz 31-Jul-2026 16:01 66K pdb_000021zx_xyz_v1-1.cif.gz 31-Jul-2026 16:01 601K pdb_000021zx_xyz_v1-1.xml.gz 31-Jul-2026 16:01 835K