Deletion of an 855bp fragment which is shared by all three fuss transcripts (B, C and D) plus insertion of an attP site which results in a premature stop codon, in the Mi{GT-GAL4}fussMI13731-GAL4 background.
Bitter sensing is impaired in fussdelDS.MI13731-GAL4/fussdelDS adults.
Expressing fussUAS.B under the control of Scer\GAL4fuss-MI13731-GAL4 (the intrinsic Gal4 driver of fussdelDS.MI13731-GAL4) rescues the bitter sensing impairment of fussdelDS/fussdelDS.MI13731-GAL4 adults.