SLC6A3 and autism: We adopted the Gal4/UAS system to express hDAT WT or hDAT R445C specifically in DA neurons of flies homozygous for the Drosophila DAT null allele (DATfmn) (Campbell et al., 2019; Cartier et al., 2015; NIH ARRA Autism Sequencing Consortium et al., 2013).