FIGURE 6.
MALDI-TOF mass spectra of the synthetic His-rich decapeptide dimer and its metal adducts. The peptide (HGHVHTHRVLHKHVHKHRVL), excerpted from the histidine-rich N-terminal domain, was incubated with a 10-fold molar excess of Fe3+, Ni2+, Zn2+, Co2+, and Cu2+ in 25 mM N-ethylmorpholine and 30 mM KCl buffer (pH 7.4).