... solid line), in the presence of 100 lM neurotoxin (•, dotted line), in the presence of 200 lM neurotoxin ( , dottedline) and in the presence of neurotoxin and50 lM dopamine (h, dashed line).Modulation ... Nota-bly, in the presence of the neurotoxin, there was adelay in the lag time for fibrillation. The lag timeincreased from 74.9 h in case of a -synuclein alone to86.8 and 93.6 h in the presence of ... following aggregation for 240 h. Samples are of a-synuclein incubated alone (A), in the presence of 100 lM MPTP (B), in the presence of 200 lM MPTP (C), in the presence of 100 lM MPP+(D), in the...