• Title/Summary/Keyword: soybean cell wall and soymilk residue

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Selective Removal of Protease from Soybean Cell Wall Degrading Enzyme Complex Isolated from Aspergillus niger CF-34 (Aspergillus niger CF-34로부터 분리한 대두세포벽분해효소 복합체 중의 Protease의 선택적인 제거)

  • Choi, Yeon-Bae;Kim, Kang-Sung;Sohn, Heon-Soo
    • Korean Journal of Food Science and Technology
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    • v.27 no.3
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    • pp.370-374
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    • 1995
  • By exposing the complex enzyme solution to alkaline condition, it was possible to remove the protease activity selectively without inactivation of soybean cell wall degrading activity of the crude enzyme complex produced by Aspergillus niger CF-34. Optimum reaction conditions were as follow. pH was $9.0{\pm}0.1$, temperature was $20^{\circ}C$ and reaction time was 30 min with gentle stirring. Over 90% of protease activity could be eliminated while the activities of pectinase, polygalacturonase, xylanase, carboxymethyl cellulase and soybean cell wall degrading enzyme were maintained to $80{\sim}100%$. Through alkali treatment, it was discovered that the quality and organoleptic properties of soy protein produced by this enzymes were improved because the hydrolysis of protein and formation of bitter peptide were decreased.

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