SOD-Like Activity of Copper(II) Containing Metallopeptides Branched By 2,3-Diaminopropionic Acid: What the N-Termini Elevate, the C-Terminus Ruins

Relations between structural modifiactions and SOD-like activity of four branched CuII-metallopeptides based on l-2,3-diaminopropionic acid are reported. The IC50 values (McCord–Fridovich method) illustrate that enhanced SOD-like activity is warranted by exclusive N-terminal His localization that surmounts the driving force by the CuII/I formal potential.