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PDB Entry Versioning
On October 4th, 2017, the wwPDB introduced a versioning system to enable depositor-initiated or wwPDB-initiated updates to previously released PDB entries while retaining the same PDB accession code. A new FTP repository , now hosts versioned structural ...
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Large Structures Large Structures are large structure entries which exceed the limitations of the original PDB file format and are released as a single entry without being split into multiple entries. Since they cannot be expressed in a PDB file, they ...
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To tell whether a PDB entry type is a large structure or not - FAQ
Q) How can I tell whether a PDB entry type is a large structure or not? A) You can tell by referring to the pdbx_database_status.pdb_format_compatible field in PDBx/mmCIF or PDBML files, or using the CIF query or SQL search services to extract this field ...
Theoretical Models
Theoretical Models The PDB separated theoretical model coordinate files from the main archive beginning July 1, 2002. After that date, the main archive has consisted of structures determined using experimental methods only. Theoretical models are only ...
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Large structure entries
"Large Structures" are entries represented only in PDBx/mmCIF format because of one of the following reasons. too large ( 99,999 atoms) too complex ( 62 chains) chain ids with more than 2 characters As of December 10 2014, the previously split ...
About Asymmetric unit and Biological unit
Introduction The atomic coordinate data in PDB is "asymmetric unit", which includes minimum essential. It doesn't always mean actual functional unit in organisms. The functional structures are called "biological unit", some of them are equal to the ...