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(a) Space-filling model of ChT. Active site (yellow) is surrounded by a ring of cationic residues (blue). (b) Amphiphilic MMPCs with anionic functional groups (red) in their terminals can interact with ChT via electrostatic complementarity. (c) Four derivatives of trimethylamine-functionalized surfactant used for surface modification of MMPC anionic monolayer. (d) Monolayer composition of AuCOOH (reproduced with permission from [26] © 2003, American Chemical Society).
