Abstract
Polypeptide assembly and aggregation are the common forms of its physiological and pathological activity, and monitoring them on a molecular level is critical for resolving numerous medical (e.g., onset of neurodegenerative diseases) or biological problems. Sensitivity of the intrinsic fluorescence of protein to its assembly, aggregation, or complexation offers a noninvasive methodology for identifying and determining different stages of these processes. In this protocol, we present the approach based on the time-resolved emission spectra (TRES), which reveals the number of fluorescent residues, the presence of dielectric relaxation, and the changes in fluorescence kinetics during aggregation.
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