Chem & Physics Quiz
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A calcium-binding protein contains an EF-hand-like loop in which a glutamate side chain coordinates Ca2+^{2+} through a carboxylate oxygen. In a mutant, this glutamate is replaced by leucine (E;2L). In vitro, the mutant shows substantially reduced Ca2+^{2+} affinity and altered thermal stability, while overall secondary structure content remains similar by circular dichroism. What is the most likely consequence of the mutation described?
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