A macromolecular Gd(III) complex as pH-responsive relaxometric probe for MRI applications

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Silvio Aime, Simonetta Geninatti Crich, Mauro Botta, Giovanni Giovenzana, Giovanni Palmisano and Massimo Sisti


Abstract

The ability of the paramagnetic macromolecular complex (GdDO3ASQ)30-Orn114 to enhance the water proton relaxation rate has been found to be a function of pH; this behaviour is related to the structural changes occurring in the polypeptide upon protonation of the side-chain NH2 groups.


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