6EZ0:
reference: Specific phosphorothioate substitution within domain 6 of a group II intron ribozyme leads to changes in local structure and metal ion binding., Erat MC, Besic E, Oberhuber M, Johannsen S, Sigel RKO, J Biol Inorg Chem. 2017 Dec 7. pii: 10.1007/s00775-017-1519-3. doi:, 10.1007/s00775-017-1519-3. PMID: 29218637

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