6XUZ:
reference: PI by NMR: Probing CH-pi Interactions in Protein-Ligand Complexes by NMR., Platzer G, Mayer M, Beier A, Bruschweiler S, Fuchs JE, Engelhardt H, Geist L, Bader G, Schorghuber J, Lichtenecker R, Wolkersdorfer B, Kessler D, McConnell DB, Konrat R, Angew Chem Int Ed Engl. 2020 May 18. doi: 10.1002/anie.202003732. PMID: 32421895

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