There are some allergenic constituens in the soybean and soybean products that can lead the hypersensitive response in the gastrointestinal tract of some young animals.The hypersensitive response triggered by soybean antigen will lead the alterations in small intestinal morphology and develop the malabsorption of the intestine that followed by a reduction in growth rate.The main objective of this article is to depict and analyse the sorts of soybean antigen and their biological property,the soluble antigen ...