Abstract

A ginger rhizome from the local market, Zingiber officinale var. Bentong, was used to extract protease. The activity of the protease was estimate during the extraction, the effects of pH and stabilizer were investigated. The best conditions were found to be a buffer of sodium phosphate, pH 7, 10 mM cysteine, and 5 mM EDTA as stabilizer. During the extraction process, 1% of crude ginger protease (GP) yield with a specific activity of 198 U/mg protein was generated. The protease functioned best at a pH of 7.0 and 60 °C, respectively. The effect of partially purified ginger protease on cholesterol (lipid profile) and liver function in mice was investigated.

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