Figure 2.
Interactions of peptides H-D-Tyr-Val-Val-OBz (A), H-D-Tyr-Val-Trp-OBz (B), H-D-Tyr-D-Val-Val-OBz (C), and H-D-Tyr-Val-Val-O-(3-Br)-Bz (D) with the amino acids residues of KOR binding site.
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