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Tetartohedral crystal twinning is discussed as a particular case of (pseudo)merohedral twinning when the number of twinned domains is four. Tetartohedrally twinned crystals often possess pseudosymmetry, with the rotational part of the pseudosymmetry operators coinciding with the twinning operators. Tetartohedrally twinned structures from the literature are reviewed and the recent structure determination of tetartohedrally twinned triclinic crystals of human complement factor I is discussed.

Original publication

DOI

10.1107/S0907444912006737

Type

Journal article

Journal

Acta Crystallogr D Biol Crystallogr

Publication Date

04/2012

Volume

68

Pages

418 - 424

Keywords

Complement Factor I, Crystallography, X-Ray, Databases, Protein, Humans