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During the off-period, the physiological changes initiated by the peptides continue to consolidate
For example, by choosing alanine at position 18 instead of arginine in GCG, peptide 20 lost the cation-pi stacking with W215 ECL1 and hydrogen bond with Q204 ECL1 , thereby allowing its outward movement toward ECL1 and leading to the formation of another hydrogen bond (D21 P -I206 ECL1 ) (Fig
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