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QCM-D tracking of 2000 µM SLL, SDS, LA, and LacA interactions with supported lipid bilayer (SLB) platform. (A) Resonance frequency (∆f) and (B) energy dissipation (∆D) signals are presented as a function of time. The dashed lines indicate the initial baseline values corresponding to the DOPC SLB platform alone. Arrow 1 specifies the time when test compounds were added (t = 5 min) and arrow 2 shows the time when the buffer washing step commenced (t = 65 min).
