5LWO:
reference: Internal Dynamics of the 3-Pyrroline-N-Oxide Ring in Spin-Labeled Proteins., Consentius P, Loll B, Gohlke U, Alings C, Muller C, Muller R, Teutloff C, Heinemann U, Kaupp M, Wahl MC, Risse T, J Phys Chem Lett. 2017 Feb 23:1113-1117. doi: 10.1021/acs.jpclett.6b02971. PMID: 28221042

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