The Obp57c start codon has been substituted with a stop codon plus a loxP cassette containing the Scer\GAL4 coding region and a mini-w marker.
The Obp57c start codon has been substituted with a stop codon.
The Obp57c start codon has been substituted with a stop codon and a floxed GAL4-mini-white gene has been inserted.
Mutant flies show normal repulsion to each of the bitter tastants papaverine and berberine in a two-way choice taste assay.