Related Experiment Video
Updated: May 24, 2026

Fully Autonomous Characterization and Data Collection from Crystals of Biological Macromolecules
Published on: March 22, 2019
Frequency distribution of the reduced unit cells of centred lattices from the Protein Data Bank
1Department of Biological Sciences, National University of Singapore, Singapore. dbsks@nus.edu.sg
Abstract:
In crystallography, a centred conventional lattice unit cell has its corresponding reduced primitive unit cell. This study presents the frequency distribution of the reduced unit cells of all centred lattice entries of the Protein Data Bank (as of 23 August 2011) in four unit-cell-dimension-based groups and seven interaxial-angle-based subgroups. This frequency distribution is an added layer of support during space-group assignment in new crystals. In addition, some interesting patterns of distribution are discussed as well as how some reduced unit cells could be wrongly accepted as primitive lattices in a different crystal system.
Related Concept Videos
Lattice Centering and Coordination Number
Types of Unit Cells
Imagine taking a large number of identical...
Unit Cells
Structures of Solids
Protein Families
Trends in Lattice Energy: Ion Size and Charge
Crystal Density

