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Two-dimensional DOSY experiment with Excitation Sculpting water suppression for the analysis of natural and biological media

机译:二维DOSY实验与激发雕刻水抑制对自然和生物介质的分析

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摘要

The Bipolar Pulse Pair Stimulated Echo NMR pulse sequence was modified to blend the original Excitation Sculpting water signal suppression. The sequence is a powerful tool to generate rapidly, with a good spectrum quality, bidimensional DOSY experiments without solvent signal, thus allowing the analysis of complex mixtures Such as plant extracts or biofluids. The sequence has also been successfully implemented for a protein at very-low concentration in interaction with a small ligand, namely the salivary IB5 protein binding the polyphenol epigallocatechine gallate. The artifacts created by this sequence can be observed, checked and removed thanks to NPK and NMRnotebook softwares to give a perfect bidimensional DOSY spectrum.
机译:修改了双极脉冲对受激回波NMR脉冲序列,以融合原始的激励雕刻水信号抑制。该序列是一种强大的工具,可以快速生成具有良好光谱质量的二维DOSY实验,而无需溶剂信号,因此可以分析复杂的混合物,例如植物提取物或生物流体。该序列也已成功地与低浓度的蛋白质与一个小的配体相互作用,即结合多酚表没食子儿茶素没食子酸酯的唾液IB5蛋白实现了该序列。借助NPK和NMRnotebook软件,可以观察,检查和清除由该序列产生的伪影,从而获得完美的二维DOSY光谱。

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