5AOO:
reference: The use of noncrystallographic symmetry averaging to solve structures from data affected by perfect hemihedral twinning., Sabin C, Plevka P, Acta Crystallogr F Struct Biol Commun. 2016 Mar 1;72(Pt 3):188-97. doi:, 10.1107/S2053230X16000923. Epub 2016 Feb 16. PMID: 26919522

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