5XE4:
reference: Engineering Aromatic-Aromatic Interactions To Nucleate Folding in Intrinsically Disordered Regions of Proteins., Balakrishnan S, Sarma SP, Biochemistry. 2017 Aug 22;56(33):4346-4359. doi: 10.1021/acs.biochem.7b00437., Epub 2017 Aug 11. PMID: 28738155

This OCA Structure page
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