Defatted soybean milk, soybean protein and soybean protein material and process for preparing them

摘要

There is disclosed a process for producing a soybean protein material and a soybean protein by extracting defatted soybean milk from a defatted soybean raw material in an aqueous system by preventing association of soybean proteins, separating the defatted soybean milk from the system to obtain an extraction residue as the soybean protein material, and isolating a soybean protein from the defatted soybean milk, said defatted soybean milk being kept at 40 DEG C. or lower until isolation of said soybean protein. The isolated soybean protein having properties that can form a transparent solution and gel which cannot be obtained by a conventional isolated soybean protein is disclosed. The soybean protein material has excellent water retention and oil retention together with minimized mouthfeel change due to freeze-thaw treatment.