2WXC:
reference: The Folding Mechanism of BBL: Plasticity of Transition-State Structure Observed within an Ultrafast Folding Protein Family., Neuweiler H, Sharpe TD, Rutherford TJ, Johnson CM, Allen MD, Ferguson N, Fersht AR, J Mol Biol. 2009 May 13. PMID: 19445954

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