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Structure-based design rationale for organic-modified libraries for PSD-95 PDZ3, based on the complex between PDZ3 and KKETWV. Positions P0 and P−2 denote conserved primary binding determinants. P−1, occupied by Trp, will be replaced by Lys acylated with organic acids. Blue surface represents a 6Å-region encircling the Trp indole.
