TTG, or Transglutaminase 2, is a human gene encoded by TGM2. It may also be known as: Protein-glutamine gamma-glutamyltransferase 2; Transglutaminase C; TG(C); TGC; TGase C; Transglutaminase H; TGase H; Transglutaminase-2; TGase-2; Protein-glutamine gamma-glutamyltransferase 2 ; Tissue transglutaminase; C polypeptide, protein-glutamine-gamma-glutamyltransferase; G-ALPHA-h; GNAH; HEL-S-45; TG2. The encoded protein is an enzyme with an amino acid length of 687 and a mass of 77.3 kDa. TTG is a member of the Transglutaminase superfamily, Transglutaminase family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.