Figure 4: Pyrene fluorescence assay. Ratio between the first and the third vibronic band (I1/I3) of the pyrene emission spectrum as a function of DHA concentration (0-500 μM) in the absence (black circles) and in the presence of μ-syn fragments. The analyses were conducted using 5 μM peptide in PBS pH 7.4 and are reported as follows: A, syn1-99, B, syn1-52, C, syn57-102 and D, syn108-140.