1JY9:
reference: Length-dependent stability and strand length limits in antiparallel beta -sheet secondary structure., Stanger HE, Syud FA, Espinosa JF, Giriat I, Muir T, Gellman SH, Proc Natl Acad Sci U S A 2001 Oct 9;98(21):12015-20. PMID: 11593011

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