Fig 4. Cyclic voltammograms recorded in 0.5 mM aqueous solution of Cu(II)-NSFRY-NH2 complex (black solid line) and NSFRY-NH2 peptide (black dashed line) at pH 6.7; Cu(II)-AAAAA-NH2 complex (red solid line) and AAAAA-NH2 peptide (red dashed line) at pH 8.0; Cu(II)-NSFRA-NH2 complex (blue solid line) and NSFRA-NH2 peptide (blue dashed line) at pH 7.1.
