1H NMR Study of the Enantioselective Binding of أƒإ½أ‚â€؛- and أƒإ½أ‚â€‌-[Ru(bpy)2(m-bpy-GHK)]Cl2 to the Deoxynucleotide Duplex d(5'-C1G2C3G4A5A6T7T8C9G10C11G12-3')2