TTYH3 is a symbol for the gene, Tweety family member 3, in humans. Other names include: Protein tweety homolog 3; hTTY3. The encoded protein has an amino acid length of 523 and a mass of 57.5 kDa. Other isoforms may exist. TTYH3 is a member of the Tweety family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.