TTYH1 encodes the human gene, Tweety family member 1. It may also be known as: Protein tweety homolog 1; hTTY1. The encoded protein has an amino acid length of 450 and a mass of 49.1 kDa. TTYH1 is a member of the Tweety family. Homologs of this gene exist in other organisms, including: Mouse, Fly, Rat, Zebrafish, Frog.