Stability curves representing the temperature dependence of the Gibbs free energy of the unfolding of psychophilic, mesophilic and thermophilic α-amylases are compared. The published results indicate that the stability is highest in the case of thermophilic α-amylase and lowest for psychophilic α-amylase. The unfolding transition temperatures, the so-called melting temperatures, are also evident. Melting temperature is highest for thermophilic α-amylase and lowest for psychophilic α-amylase.
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