Purification of Q-enzyme prepared from the extract of rice seed at the milky stage employing precipitation by lead acetate, fractionation by ammonium sulfate and chromatography on hydroxylapatite was carried out. The highly purified preparation of Q-enzyme was nearly homogeneous in electrophoresis, chromatography and solubility, and was nearly free from amylase, maltase, isoamylase, phosphorylase and phosphatase activities. Some of the physico-chemical and enzymic properties of the preparation were also investigated.
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Ikuo IGAUE (1962) studied this question.
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