6MPL:
reference: A Hendecad Motif Is Preferred for Heterochiral Coiled-Coil Formation., Kreitler DF, Yao Z, Steinkruger JD, Mortenson DE, Huang L, Mittal R, Travis BR, Forest KT, Gellman SH, J Am Chem Soc. 2019 Jan 15. doi: 10.1021/jacs.8b11246. PMID: 30645104

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