Fine optimization of a dissolution dynamic nuclear polarization experimental setting for <sup>13</sup>C NMR of metabolic samples

نویسندگان

چکیده

Abstract. NMR-based analysis of metabolite mixtures provides crucial information on biological systems but mostly relies 1D 1H experiments for maximizing sensitivity. However, strong peak overlap spectra often is a limitation the inherently complex mixtures. Dissolution dynamic nuclear polarization (d-DNP) improves NMR sensitivity by several orders magnitude, which enables 13C metabolites at natural abundance. We have recently demonstrated successful introduction d-DNP into full untargeted metabolomics workflow applied to study plant metabolism. Here we describe systematic optimization experimental settings abundance and show how resolution, sensitivity, ultimately number detectable signals improve as result. systematically optimized parameters involved (in semi-automated prototype system, from sample preparation signal detection, aiming providing an guide potential users such who may not be experts in instrumental development). The procedure makes it possible detect previously inaccessible protonated with least 4 times improved line shape high repeatability compared reported d-DNP-enhanced metabolomic study. This extends application scope hyperpolarized paves way more general use DNP-hyperpolarized studies.

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ژورنال

عنوان ژورنال: Magnetic resonance

سال: 2022

ISSN: ['2699-0016']

DOI: https://doi.org/10.5194/mr-3-183-2022