Cholecystokinin
Hormone
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Cholecystokinin is a peptide hormone of the gastrointestinal system responsible for stimulating the digestion of fat and protein. Cholecystokinin, formerly called pancreozymin, is synthesized and secreted by enteroendocrine cells in the duodenum,... Wikipedia
Location: small intestine
Molecular function: hormone activity; protein binding; neuropeptide hormone activity; peptide hormone receptor binding