If a person lacks functional gustducin, which consequence follows regarding sweet taste perception?

💡 Explanation

Gustducin is a G protein crucial for the transduction of sweet taste signals in taste receptor cells; because a lack of functional gustducin impairs this signaling pathway, sweet stimuli cannot be effectively transduced, resulting in diminished perception. Therefore, sweet taste perception is impaired, rather than enhanced, and is specific to sweet rather than umami, and unlike bitter perception.

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