Research Article
Interaction of Small Zinc Complexes with Globular Proteins and Free Tryptophan
Figure 1
Zn(II) complexes used in this study: Complex 1 is a dianion; Complexes 2–6 are neutral; Complexes 7 and 8 are dications. 1. Na2[Zn(EDTA)]·2H2O, 2. Zn-Pr-Pr, 3. Zn(pya2tn)Cl2, 4. Zn(pya2tn-OH)Cl2, 5. Zn-sal-Ph-Cl2, 6. Zn-sal-NH2, 7. Zn-(dien)2·ZnCl4, and 8. Zn(en)3·2Cl·H2O [EDTA = ethylenediaminetetraacetate, Pr-Pr = N,N′-dimethyl-N,N′-bis(2-sulfanylpropyl)propylenediamine, tn = trimethylenediamine, pya = Schiff base ligand derived from pyridine-2-carboxaldehyde and 1,3-diaminopropane (pya2tn), sal-Ph = N-salicylideneaniline, sal-NH2 = salicylaldehyde hydrazine, dien = diethylenetriamine, and en = ethylenediamine].