کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1189258 | 963508 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of chemical structure of nonprotein proteinase inhibitors from dried figs
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Two types of the nonprotein proteinase inhibitors, P and B samples were previously isolated from dried figs by gel permeation and high-performance liquid chromatography. In the present study, we investigated the chemical structure of the B sample using both mass spectrometry (MS) and solid-state nuclear magnetic resonance. Fast atom bombardment and matrix-assisted laser desorption ionization-time of flight MS experiments showed losses of 16, 44, 176, and 338Â Da. By electrospray ionization tandem MS, the product-ion spectra of m/z 712, 731, and 750 in the parent ions indicated that the fragmentation ion at m/z 175 was the repeated structure of the parent ions. We propose here that the 176- and 338-Da compounds might aggregate each other, probably by polymerizations, ether linkages, and hydrogen bonding, which would result in a mass variety of the B sample as observed in the MS analyses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 107, Issue 1, 1 March 2008, Pages 305-311
Journal: Food Chemistry - Volume 107, Issue 1, 1 March 2008, Pages 305-311
نویسندگان
Ken-ichi Hatano, Kenji Kubota, Masaru Tanokura,