Table 7.

Radioligand selected for the binding study

Radioligand	Specific activity	Binding site
[3H]-Lactisole	28.2 Ci/mmol (1.04 TBq/mmol)	TMD383
[3H]-Perillartine	17.1 Ci/mmol (633 GBq/mmol)	TMD280
[3H]-Rebaudioside B	3.2 Ci/mmol (85 GBq/mmol)	presumed VFD2
[14C]-Sucrose	400–700 mCi/mmol (14.8–25.9 GBq/mmol)	VFD2 and VFD39,86