Deletion of approximately 3.3kb in the Dh44-R1 locus ( 2R:14381876 to 14385244), including most of the exons.
3369bp deletion that removes the coding region of Dh44-R1.
Dh44-R1KO homozygotes fail to show the increased food consumption induced by dietary amino acids normally observed in heterozygous and wild-type controls.