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  • 标题:ライ小麦の発芽種子アミラーゼの精製および性状
  • 本地全文:下载
  • 作者:谷口(山田) 亜樹子 ; 山﨑 俊介 ; 菊池 修平
  • 期刊名称:日本家政学会誌
  • 印刷版ISSN:0913-5227
  • 电子版ISSN:1882-0352
  • 出版年度:2012
  • 卷号:63
  • 期号:11
  • 页码:707-713
  • DOI:10.11428/jhej.63.707
  • 出版社:The Japan Society of Home Economics
  • 摘要:

      The amylases of germinated triticale seeds were sequentially purified by ammonium sulfate precipitation, ion-exchange chromatography, and gel chromatography. Three different amylases were obtained in a pure state and tentatively designated as amylases I, II and III which each yielded a single band when examined by electrophoresis.   The respective specific activities of amylases I, II and III were 0.14-, 1.11- and 0.39-fold that of the crude enzyme extract.Amylases I, II and III had respective molecular weights of 62,000, 56,000 and 52,000. Amylase I showed the highest activity at pH 5.5 and 40℃ , amylase II at pH 5.0 and 50℃ , and amylase III at pH 5.0 and 40℃. Amylases I , II and III were stable in the range of pH 4.0-6.0 at below 50℃ . All activities of the enzymes were inhibited by mercury, PCMB, CH2ICOOH, NI2+ and Cd2+ which may indicate that the SH group was necessary for activating the three enzymes. Each amylase specifically hydrolyzed starch and amylopectin, amylase III hydrolyzing lowmolecular- weight amylose particularly well. Amylase I hydrolyzed pullulan. A qualitative thinlayer chromatographic analysis of the products of this digestion revealed enzyme specificity. The decomposition products revealed amylase I to be α-amylase, and amylases II and III to be β-amylase.

  • 关键词:ライ小麦; アミラーゼ; 酵素精製; 酵素性状; 発芽; 雑穀
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