(Tyr9)-Cholecystokinin Octapeptide (sulfated) is a sulfated peptide involved in digestion and appetite regulation, with a tyrosine substitution at position 9 to improve receptor affinity. The modification allows for enhanced studies of CCK receptor interaction and gastrointestinal motility. Researchers apply it to investigate the role of CCK in pancreatic enzyme secretion and satiety signaling.
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