Reversible Fluorescence Derivatization of Amino Groups Using Dansylaminomethylmaleic Acid via Its Anhydride.
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- SAKATA Kayo
- Graduate School of Pharmaceutical Sciences, Kyushu University
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- HAMASE Kenji
- Graduate School of Pharmaceutical Sciences, Kyushu University
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- SASAKI Shigeki
- Graduate School of Pharmaceutical Sciences, Kyushu University
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- MAEDA Minoru
- Graduate School of Pharmaceutical Sciences, Kyushu University
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- ZAITSU Kiyoshi
- Graduate School of Pharmaceutical Sciences, Kyushu University
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Abstract
A new derivatizing reagent, dansylaminomethylmaleic acid (DAM), was synthesized and utilized for the reversible fluorescence labeling of amino groups. The reagent DAM was dehydrated in the presence of (trimethylsilyl)ethoxyacetylene, a dehydrating agent, and the resulting anhydride reacted with amino groups, and could then be liberated under mild acidic conditions. With this reagent, benzylamine was derivatized as a model amino compound. The resultant fluorescent derivative, N-benzyl-2-dansylaminomethylmaleamic acid (BDAM), could be detected at 520 nm with fluorescence excitation at 340 nm. The fluorescence detection limit of BDAM (100 fmol, S/N=3) was smaller than that of intact benzylamine (200 pmol, S/N=10, absorbance at 254 nm). Under mild acidic conditions of pH 5.0, 82% of benzylamine was regenerated from BDAM within a day. With this reagent, insulin was successfully derivatized and 56% of insulin was regenerated.
Journal
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- Analytical Sciences
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Analytical Sciences 15 (11), 1095-1099, 1999
The Japan Society for Analytical Chemistry
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Details 詳細情報について
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- CRID
- 1390282679229299328
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- NII Article ID
- 130004439981
- 10004708281
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- NII Book ID
- AA10500785
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- COI
- 1:CAS:528:DyaK1MXnsVGhtLo%3D
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- ISSN
- 13482246
- 09106340
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- NDL BIB ID
- 4907932
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed