The plot of DCF fluorescence intensity vs. Aβ concentration.

<p>The plot for different Aβ peptides, (▴) 30 µM Cu²⁺ alone, (♦) Aβ1-16, (▵) Aβ1-24, (•) Aβ1-29, (○) Aβ1-35, (◊) Aβ1-40, and (▿) Aβ25-35 in the presence of 30 µM Cu²⁺. Instead of generating H₂O₂, most Aβ peptides, except of Aβ25-35, inhibit the generation of H₂O₂. All measurements were measured after the fresh prepared samples were incubated at 37°C for 1 hr.