Binding ability of l-carnosine towards Cu2+, Mn2+ and Zn2+ in aqueous solution

Chiara Abate,Donatella Aiello,Massimiliano Cordaro,Ottavia Giuffrè,Anna Napoli,Claudia Foti

Journal of Molecular Liquids（2022）

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摘要

•Manuscript clarifies chelating ability of carnosine towards Cu2+, Mn2+ and Zn2+, combining potentiometry, NMR and MS.•Potentiometry allowed to define speciation models and formation constants at different temperature and ionic strength.•1H NMR spectroscopy further confirmed the speciation model for Zn2+ -carnosine system.•High Resolution (HR) Matrix Assisted Laser Desorption Ionization (MALDI) Mass Spectrometry (MS) clarified chelating mode.•Sequestering ability of carnosine towards Cu2+, Mn2+ and Zn2+ was quantified in physiological conditions.

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关键词

Carnosine,Divalent metal cations,Thermodynamic interaction parameters,Potentiometry,1H NMR spectroscopy,MALDI Mass Spectrometry

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