1KV5:
reference: The importance of the conserved Arg191-Asp227 salt bridge of triosephosphate isomerase for folding, stability, and catalysis., Kursula I, Partanen S, Lambeir AM, Wierenga RK, FEBS Lett 2002 May 8;518(1-3):39-42. PMID: 11997014

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