6FSU:
reference: Sequence-Specific Solution NMR Assignments of the beta-Barrel Insertase BamA to Monitor Its Conformational Ensemble at the Atomic Level., Hartmann JB, Zahn M, Burmann IM, Bibow S, Hiller S, J Am Chem Soc. 2018 Sep 12;140(36):11252-11260. doi: 10.1021/jacs.8b03220. Epub, 2018 Sep 4. PMID: 30125090

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