SYT1 and attention deficit-hyperactivity disorder: Our findings support the former view that various genes are crucial in ADHD, in addition to certain regulatory genes such as Syt1, Sytalpha, Syt7, and Ih. As addressed previously, certain reasonable factors including drug dose, the differing structure of DAT between humans and Drosophila, and other targets, prevent us from visualizing the pattern of DAT inhibition after drug treatment.