... the transversal relaxation. Conversely, two equivalents of the ion cause the shift and disappearance of severalsignals, without the concomitant appearance of anynew resonance. This anomalous behavior ... 4207Understanding the binding properties of an unusualmetal-binding protein) a study of bacterial frataxinChiara Pastore1, Marisa Franzese2, Filomena Sica2,3, Pierandrea Temussi1,2and Annalisa ... protein ratio, the resonances of Arg20, Asp22 and Asp23 disap-peared, and the resonance of Leu21 shifted. At a 2 : 1ratio, the resonances of residues 19 and 44 also disap-peared, whereas those...