UCHL1 and Parkinson disease: In the PD group, there was a near-significant trend towards higher UCHL1 levels in carriers of long SNCA Rep1 alleles vs short alleles (5.21 vs 3.71 pg/ml, p= 0.056, Figure 2), while a non-significant trend was seen in healthy controls carrying long Rep1 vs short alleles (3.39 vs 1.42 pg/ml, p= 0.207), adjusted for age and gender, and disease duration in the PD group.