The interpeptidic CuII exchange rate constants were measured for two Cu amyloid-? complexes, Cu(A?1–16) and Cu(A?1–28), to fluorescent peptides GHW DAHW using a quantitative tryptophan fluorescence quenching methodology. second-order determined at three pH values (6.8, 7.4, 8.7) important the Cu(A?) coordination components Cu(A?)I Cu(A?)II. constant is approximately 104 M–1 s–1 but varies in ma...