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24 <meta charset="UTF-8">
25 <title>mmCIF File Format</title>
28 <strong>What is mmCIF ?</strong>
29 <br />mmCIF stands for 'macro-molecular Crystallographic Information
30 File'. This format was developed by the PDB consortium and the
31 International Union of Crystallography (IUCr), based on
32 Crystallographic Information File (CIF), a format used for describing
33 the structures of small molecules.
34 <br />mmCIF became the recommended format for the exchange of
35 biomacromolecular structures in 2014.
37 <strong>mmCIF and Jalview</strong> <br />Since Jalview 2.10, mmCIF
38 is used for structures downloaded from the PDB. This means:
41 <li>Jalview can use the mmCIF to read structures that are too
42 large to be represented by a single PDB file. (ie, with more than
43 >62 chains and/or 99999 ATOM records).</li>
44 <li>Jalview users will have access to the richer annotation
45 provided by PDBx/mmCIF files.</li>
46 <li>There may be slight differences between sequences
47 containing modified residues for structures downloaded in mmCIF
48 format. This is because mmCIF differs from the PDB format in the
49 way it describes non-standard sequence data.</li>
52 <em>Support for importing 3D structure data from flat file and
53 EMBL-PDBe as mmCIF was added in Jalview 2.10</em>