Tags: Protein.
For the Tetris game see Tetris: The Grand Master.Protein-glutamine gamma-glutamyltransferase E is an enzyme that in humans is encoded by the TGM3 gene.Transglutaminases are enzymes that catalyze the crosslinking of proteins by epsilon-gamma glutamyl lysine isopeptide bonds. While the primary structure of transglutaminases is not conserved they all have the same amino acid sequence at their active sites and their activity is calcium-dependent.