3UIT:
reference: Structure of an L27 domain heterotrimer from cell polarity complex Patj/Pals1/Mals2 reveals mutually independent L27 domain assembly mode., Zhang J, Yang X, Wang Z, Zhou H, Xie X, Shen Y, Long J, J Biol Chem. 2012 Mar 30;287(14):11132-40. Epub 2012 Feb 15. PMID: 22337881

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