SLC6A2 (Solute Carrier Family 6 Member 2) is a protein that acts as the norepinephrine transporter, responsible for the reabsorption of norepinephrine into presynaptic nerve terminals. This transporter plays a crucial role in regulating mood, alertness, and the stress response. It is also a target for certain antidepressant drugs. Malfunctions in SLC6A2 are linked to psychiatric and neurological disorders such as depression and attention deficit hyperactivity disorder (ADHD).