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Macromolecular CIF dictionary

The macromolecular CIF dictionary (mmCIF) is a set of data names designed to describe the macromolecular crystallographic experiment and its results. It includes the complete set of data names available in the Core CIF dictionary, but in a somewhat different formalism.

Current official release

Archival versions

Work in progress

Comprehensive information on the mmCIF dictionary project, including background and reference materials and software tools is maintained at


Updated 21 July 2005