The Cu(ii) - dietary fibre interactions at molecular level unveiled via EPR spectroscopy.

ABSTRACT: While dietary fibres have a reputation of a healthy food component, the interaction between nutrients and neutral fibers is non-covalent, and its characterization is challenging for most analytical techniques. Here, on the example of barley β-glucan (BBG) and paramagnetic Cu(ii) ions we demonstrate the performance of different Electron Paramagnetic Resonance (EPR) methods in the fibre studies. EPR techniques were tested on two spin probe systems with different affinity in the interaction with dietary fibres - Cu(OAc)₂ salt, which weakly dissociates under physiological conditions and CuSO₄ salt, which easily dissociates, so that in the latter case Cu(ii) can be considered as a 'free' ion, only chelated by water molecules. The Cu(ii)-BBG interaction was determined by pu

SUBMITTER: Syryamina VN 

PROVIDER: S-EPMC9261904 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature