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Triosephosphate isomerase (TIM) has a conserved salt bridge 20 Å away from both the active site and the dimer interface. In this study, four salt bridge mutants of Trypanosoma brucei brucei TIM were characterized. The folding and stability of the mutants are impaired compared to the wild-type enzyme. This salt bridge is part of a hydrogen bonding network which tethers the C-terminal β7α7β8α8 unit...
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