Genomic fragment containing both Dsim\Obp57d and Dsim\Obp57e.
D.melanogaster females carrying P{simObp57d-e.M} (containing both Dsim\Obp57dtMa and Dsim\Obp57etMa) in a Df(2R)Obp57d-eKO background avoid hexanoic acid in an oviposition site-preference assay, as wild-type D.simulans females do. The response of these flies to octanoic acid is not significantly different from that of the D.melanogaster control strain.
D.melanogaster females carrying P{simObp57d-e.M} (containing both Dsim\Obp57dtMa and Dsim\Obp57etMa) in a Df(2R)Obp57d-eKO background do not avoid hexanoic acid in an olfactory trap assay, in contrast to wild-type D.simulans females which do avoid it.