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Figure 4
An abbreviated example of the mmCIF description of the linkage between chemical components. In this example, the linkage between a ribose sugar and a purine base is illustrated. The component types used in this example are extensions to the standard set of component types provided in the mmCIF dictionary. These extensions, which are defined in the A La Mode local dictionary (Clowney & Westbrook, 1997aBB6), were required in order to describe the conformational diversity of nucleotide systems.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 32| Part 1| February 1999| Pages 125-133
doi:10.1107/S0021889898005160
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