Enables sweet taste receptor activity. Acts upstream of or within sensory perception of sweet taste. Predicted to be located in plasma membrane. Predicted to be integral component of membrane. Predicted to be part of sweet taste receptor complex. Predicted to be integral component of plasma membrane. Is expressed in tongue anterior part. Orthologous to human TAS1R2 (taste 1 receptor member 2). [provided by Alliance of Genome Resources, Apr 2022]