1CQU:
reference: Effects of varying the local propensity to form secondary structure on the stability and folding kinetics of a rapid folding mixed alpha/beta protein: characterization of a truncation mutant of the N-terminal domain of the ribosomal protein L9., Luisi DL, Kuhlman B, Sideras K, Evans PA, Raleigh DP, J Mol Biol 1999 May 28;289(1):167-74. PMID: 10339414

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