TG catalyzes the cross-link of side chains of two amino acids (glutamine and lysine) in liquefied proteins, and thus yielding ε- (γ-glutamyl)-lysine bond. This bond is stable against heat treatment or physical stress. Typically TG works within the protein of food materials, and contributes to improving texture properties. In case TG is used to combine quality meat/fish parts, TG works to the proteins which are added to the food applications. TG itself does not combine meat/fish parts. This is basically possible with TG and liquefied proteins. There is no technological function or effect of enzyme in the final product.