5-HT6, or, HTR6, is a human gene. Other names include: 5-hydroxytryptamine receptor 6; 5-HT-6; 5-HT6; Serotonin receptor 6; 5-HT6R. The encoded protein has an amino acid length of 440 and a mass of 47.0 kDa. Other isoforms may exist. 5-HT6 is a member of the G-protein coupled receptor 1 family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.