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CCK plays a variety of roles in digestive processes, including inhibition of food intake, consistent with a role in satiety. In the lingual epithelium, the sensing of a broad spectrum of L-amino acids is accomplished by the heteromeric amino acid (umami) taste receptor (T1R1-T1R3).T1R1 and T1R3 subunits are also expressed in the intestine.A defining characteristic of umami sensing by T1R1-T1R3 is its potentiation by IMP or GMP.ensing of amino acids by the gut-expressed taste receptor T1R1-T1R3 stimulates CCK secretion.
In addition to signal transduction by taste receptor cells, it is also clear that the sense of smell profoundly affects the sensation of taste. Think about how tastes are blunted and sometimes different when your sense of smell is disrupted due to a cold.he taste receptor cells within a bud are arranged such that their tips form a small taste pore, and through this pore extend microvilli from the taste cells. The microvilli of the taste cells bear taste receptors.