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The interaction of a series of n-alkyl trimethyl ammonium bromides (C12, C14 and C16) with egg white lysozyme have been studied using fluorescence and UV-Vis spectroscopies and isothermal titration calorimetry (ITC). The trend of variation of molar absorptivity at 281 nm, quantum yields (λex=281 nm) and heat of interaction with respect to surfactant concentration, were measured. The spectrophotometric...