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Parahydrogen Hyperpolarization Allows Direct NMR Detection of α‐Amino Acids in Complex (Bio)mixtures.

Authors :
Sellies, Lisanne
Aspers, Ruud L. E. G.
Feiters, Martin C.
Rutjes, Floris P. J. T.
Tessari, Marco
Source :
Angewandte Chemie; 12/20/2021, Vol. 133 Issue 52, p27160-27165, 6p
Publication Year :
2021

Abstract

The scope of non‐hydrogenative parahydrogen hyperpolarization (nhPHIP) techniques has been expanding over the last years, with the continuous addition of important classes of substrates. For example, pyruvate can now be hyperpolarized using the Signal Amplification By Reversible Exchange (SABRE) technique, offering a fast, efficient and low‐cost PHIP alternative to Dynamic Nuclear Polarization for metabolic imaging studies. Still, important biomolecules such as amino acids have so far resisted PHIP, unless properly functionalized. Here, we report on an approach to nhPHIP for unmodified α‐amino acids that allows their detection and quantification in complex mixtures at sub‐micromolar concentrations. This method was tested on human urine, in which natural α‐amino acids could be measured after dilution with methanol without any additional sample treatment. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00448249
Volume :
133
Issue :
52
Database :
Complementary Index
Journal :
Angewandte Chemie
Publication Type :
Academic Journal
Accession number :
154104715
Full Text :
https://doi.org/10.1002/ange.202109588