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Changes in Protease Activity of Ginger Rhizome during Postharvest Storage

Author

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  • Kazunobu Tsumura
  • Norihiro Yamada

Abstract

It has been reported that ripe ginger rhizomes contain proteolytic enzymes. In this study, we investigated the fluctuations in protease activity from ginger rhizomes stored after harvest for the utilization of proteases. The juice from ginger rhizomes that had been stored for 4 months after harvest exhibited the highest specific protease activity. Additionally, juices with high specific protease activity could form soymilk and cow milk gels. Electrophoresis experiments revealed that the protein bands in ginger rhizome juice were degraded by the proteases contained in the juice. This degradation was prevented by adding the cysteine protease inhibitor E-64.

Suggested Citation

  • Kazunobu Tsumura & Norihiro Yamada, 2025. "Changes in Protease Activity of Ginger Rhizome during Postharvest Storage," Journal of Food Research, Canadian Center of Science and Education, vol. 14(1), pages 1-42, January.
    • Handle: RePEc:ibn:jfrjnl:v:14:y:2025:i:1:p:42
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    JEL classification:

    • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
    • Z0 - Other Special Topics - - General

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