Glutamine transaminase also called TG enzyme is a bio-enzyme preparation widely existing in human beings, other animals, plants and microorganisms. Industrial TG enzyme is mainly extracted from the fermentation metabolite of streptoverticillium mobaraense.

Glutamine transaminase is a type of monomeric protein composed of 331 amidogens. Its molecular weight is about 38,000. It has an active center. It plays the catalysis role in protein polypeptide to promote covalent cross-linking within and between molecules, so as to improve the structure and function of protein.

Glutamine transaminase features good pH stability, quick reaction, low substrate specificity, easy storage, wide scope of application and safety in use. It can be used for food processing to improve the texture of foods, improve the nutritive value of protein and improve the elasticity and water holding capacity of foods.