Tea catechins have strong bitterness and influence the taste of tea. Among the 25 human bitter-taste receptors (TAS2Rs), we found that hTAS2R14 responded to catechins, in addition to hTAS2R39, a known catechin receptor. Although hTAS2R14 responded to (-)-epicatechin gallate and (-)-epigallocatechin gallate, it did not respond to (-)-epicatechin and (-)-epigallocatechin.
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