... the control of the GAL10 pro-moter. The induction of the yeast, by galactose containingmedia, results in overexpression of GAL4, in turn inducingan increase of the expression of the OR gene ... resulting in the conforma-tional change of the receptor and productive inter-action of its intracellular loops with Golf, the a subunit of the heterotrimeric G protein [ 1–3 ]. Several lines of evidence ... digestion, resulting in almostFig. 1. mRNA of the rat I7 OR or human OR17-40 receptor in trans-formed yeast strains. Total RNAs from either uninduced or inducedstrains transformed with pJH2-I7...