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Binding dissociation constants (KD) of selected mutant peptides of d-AKAP2. Binding was evaluated for both RIα and RIIα by using fluorescence anisotropy as described in Fig. 3. Substituted residues are bold. Tryptophan at position 21, highlighted with the arrow, is important for discriminating against binding to the RIIα subunit. PV-38 is designated the RI-specific binding peptide, AKB(RI) and is indicated by an asterisk.
