Biophysical Journal 66: 482-501 (1994)
© 1994 the Biophysical Society

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The use of fluorescence methods to monitor unfolding transitions in proteins.

Department of Chemistry, University of Mississippi, University 38677.

ABSTRACT

This article discusses several strategies for the use steady-state and time-resolved fluorescence methods to monitor unfolding transitions in proteins. The assumptions and limitations of several methods are discussed. Simulations are presented to show that certain fluorescence observables directly track the population of states in an unfolding transition, whereas other observables skew the transition toward the dominant fluorescing species. Several examples are given, involving the unfolding of Staphylococcal aureus nuclease A, in which thermodynamic information is obtained for the temperature and denaturant induced transitions in this protein.

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