Putative taste receptor. TAS1R1/TAS1R3 responds to the umami taste stimulus (the taste of monosodium glutamate). Sequence differences within and between species can significantly influence the selectivity and specificity of taste responses. Forms heterodimers with TAS1R3. Incomplete sequence. Belongs to the G-protein coupled receptor 3 family. TAS1R subfamily. The taste experience - Issue 55 of February 2005