In genetics, rs28363170 (DAT1-VNTR) is a genetic variation at SLC6A3, the gene that encodes the dopamine transporter. It is polymorphism as a 40 base pairs VNTR in the 3' untranslated region. It is an deletion/insertion polymorphism (DIP).
The 9-repeat and the 10-repeat are the most common alleles.
References
Rs28363170 Wikipedia(Text) CC BY-SA