SLC6A3（solute carrier family 6 member 3），癌症关联基因，基因ID：6531，该基因编码多巴胺转运体，多巴胺转运体是钠和氯依赖性神经递质转运体家族的成员该基因的3’UTR包含一个40 bp的串联重复序列，称为可变数目串联重复序列或VNTR，它可以存在于3到11个拷贝中重复次数的变化与特发性癫痫、注意缺陷多动障碍、对酒精和可卡因的依赖、对帕金森病的易感性和对尼古丁依赖的保护有关This gene encodes a dopamine transporter which is a member of the sodium- and chloride-dependent neurotransmitter transporter family. The 3' UTR of this gene contains a 40 bp tandem repeat， referred to as a variable number tandem repeat or VNTR， which can be present in 3 to 11 copies. Variation in the number of repeats is associated with idiopathic epilepsy， attention-deficit hyperactivity disorder， dependence on alcohol and cocaine， susceptibility to Parkinson disease and protection against nicotine dependence.[provided by RefSeq， Nov 2009]。