Htr5 is an alias for the gene, 5-hydroxytryptamine (serotonin) receptor 5A, G protein-coupled, in humans. Other names include: 5-hydroxytryptamine receptor 5A; 5-HT-5; 5-HT-5A; 5-HT5A; Serotonin receptor 5A. The encoded protein has an amino acid length of 357 and a mass of 40.3 kDa. Htr5 is a member of the G-protein coupled receptor 1 family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.