5 <title>mmCIF File Format</title>
8 <strong>What is mmCIF ?</strong>
9 <br />mmCIF stands for 'macro-molecular Crystallographic Information
10 File'. This format was developed by the PDB consortium and the
11 International Union of Crystallography (IUCr), based on
12 Crystallographic Information File (CIF), a format used for describing
13 the structures of small molecules.
14 <br />mmCIF became the recommended format for the exchange of
15 biomacromolecular structures in 2014.
17 <strong>mmCIF and Jalview</strong> <br />Since Jalview 2.10, mmCIF
18 is used for structures downloaded from the PDB. This means:
21 <li>Jalview can use the mmCIF to read structures that are too
22 large to be represented by a single PDB file. (ie, with more than
23 >62 chains and/or 99999 ATOM records).</li>
24 <li>Jalview users will have access to the richer annotation
25 provided by PDBx/mmCIF files.</li>
26 <li>There may be slight differences between sequences
27 containing modified residues for structures downloaded in mmCIF
28 format. This is because mmCIF differs from the PDB format in the
29 way it describes non-standard sequence data.</li>
32 <em>Support for importing 3D structure data from flat file and
33 EMBL-PDBe as mmCIF was added in Jalview 2.10</em>