Carbon-centered radicals of alcohols commonly used as hydroxyl radical scavengers (MeOH, EtOH, i-PrOH and t-BuOH) add reversibly to histidine with equilibrium constants up to 3 × 10(3) M(-1) and rate constants on the order of 10(9) M(-1) s(-1). Similar equilibria may compromise determinations of one-electron (radical) electrode potentials.
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Nauser et al. (2014) studied this question.
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