Fig. 3.
ΔGapp for different aromatic amino acids. The H segments used in A have the sequence AAAALAAAAAAAAALAAAA, with the Ala in the indicated position replaced by the nonproteinogenic amino acid. In B, the H segments used for Phe, Me-Tyr, and Tyr (green trace) also have this sequence, whereas the sequence used for Tyr (light-blue trace) and the aniline side chain is AAAALALAAAAALALAAAA. In C, AAAALAAAAAAAAALAAAA is used for Trp (green trace), Me-Trp and the benzothiophene side chain, and AAAALALAAAAALALAAAA is used for Trp (light-blue trace).