... 269) 1327 they are represented by the MH-2L formula, where M isCu(II) or Ni(II). For DAHK there a re two such complexes,MH-1L and MH-2L, differing by the protonation state of the lysine amine, ... b(HnL), j and n ¼ 2, except for DAHKam, where j ¼ 1 and n ¼ 3.bNi(II) data from ref [11].c[31].d[36].eglycylglycylhistamine, [9].fa-hydroxymetylseryl-a-hydroxymetylserylhistidinamide; Cu(II) ... partially sh ielded from solution by the rest of the protein. There is no correlation between the complex stability and the rate of its formation. The Ni(II) for Cu(II) exchange rates f or peptides are...