Abstract

Understanding how electron transfer (ET) is affected by the dynamics of the medium is of fundamental significance for energy production in biology. ET is also used in many experimental techniques. A recent example is photo-induced electron transfer (PET), which is being employed to measure the rates of intra-molecular contact formation in intrinsically disordered proteins (IDPs) and polymers. Such measurements reveal important information on the structure and dynamics of IDPs. In this setting, tryptophan and cysteine are particularly useful probes, as they can be mutated into a protein sequence with minimal perturbation.

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