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Quantitative Analysis of Yellow Pigment in Takuan-zuke and Their ABTS Radical Cation Scavenging Activity

  • TAKAHASHI Asaka
    Nagano Prefectural College
  • MATSUOKA Hiroki
    Department of Health and Nutrition, Takasaki University of Health and Welfare
  • WATANABE Emi
    Department of Health and Nutrition, Takasaki University of Health and Welfare
  • SHINAGAWA Atsuko
    Department of Health and Nutrition, Takasaki University of Health and Welfare
  • OZAWA Yoshio
    Department of Health and Nutrition, Takasaki University of Health and Welfare
  • YAMADA Yoichi
    Faculty of Education, Utsunomiya University
  • UDA Yasushi
    Department of Bioproductive Sciences, Faculty of Agriculture, Utsunomiya University

Abstract

2-[3-(2-Thioxopyrrolidin-3-ylidene)methyl]-tryptophan (TPMT) is the main yellow pigment in salted radish roots (takuan-zuke). In the present study, we investigated the content of 1-(2-thioxopyrrolidin-3yl)-1,2,3,4-tetrahydro-β-carboline-3-carboxylic acid (TPCC) as a precursor of the yellow pigment and TPMT in commercial takuan-zuke. The total content of stereoisomers was 0.2-36.4 mg/100 g (2-364 ppm) for TPCC, and 0-6.6 mg/100 g (0-66 ppm) for TPMT. TPCC and TPMT showed radical scavenging activity against ABTS radical cation than the classical antioxidant (ascorbic acid and Trolox). The antioxidative activity showed no differences for TPCC stereoisomers, but showed differences for E/Z ratiocontrolled TPMT solutions.

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Details

  • CRID
    1390282679432023808
  • NII Article ID
    10025349523
  • DOI
    10.3136/fstr.15.337
  • ISSN
    1881-3984
    1344-6606
  • Text Lang
    en
  • Data Source
    • JaLC
    • CiNii Articles
    • Crossref
    • KAKEN

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