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Signal intensity change at 2070 cm−1 and 2875 cm−1 monitoring melittin interacting with d-DPPG/DPPG bilayers on CaF2. Melittin stock solution was injected into the subphase at 200 s. Four solution concentrations were used, and dramatically different patterns were observed (Reproduced with permission from Biophys. J. 2007, 93, 866–875. Copyright 2007, Elsevier).
