... Journal compilation ê 2007 FEBS 4207 Understanding the binding properties of an unusual metal -binding protein ) a study of bacterial frataxin Chiara Pastore1, Marisa Franzese2, Filomena Sica2,3, ... A ˚and 2.6 A ˚ ) and Glu19 (2.7 A ˚ ), andtwo water molecules (1.7 A ˚and 1.9 A ˚ ) (Fig. 4E). InM5, the side chains of Asp76 (1.9 A ˚ ) and Asp27(2.4 A ˚ ) of a symmetry-related molecule and ... Fe2+⁄ 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...