Changes in the Composition and Size Distribution of Soymilk Protein Particles by Heating

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Abstract

The protein particles in soymilk were fractionated in size by differential centrifugation. Particles of more than 100 nm in diameter (LSP) constituted 40% of the total protein in raw soymilk, 70% of the protein components being 1 11S globulin. LSP was not formed in the presence of 2-mercaptoethanol and sodium ascorbate. LSP was decreased by heating, and particles of 100-40 nm in diameter (MSP) were increased. The formation of MSP was not due to any degradation of LSP but to the combination of supernatant proteins of less than 40 nm in diameter with each other. MSP formed by heating contained the β subunit of 7S and the basic subunit of 11S as main components. The particles of more than 40 nm in diameter (LSP + MSP) constituted 50% of the total protein in both raw soymilk and soymilk. © 1991, Japan Society for Bioscience, Biotechnology, and Agrochemistry. All rights reserved.

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Ono, T., Choi, M. R., Ikeda, A., & Odagigi, S. (1991). Changes in the Composition and Size Distribution of Soymilk Protein Particles by Heating. Agricultural and Biological Chemistry, 55(9), 2291–2297. https://doi.org/10.1271/bbb1961.55.2291

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