We immunoblotted fibroblast lysates from healthy subjects and sporadic PD patients for five of the significantly altered proteins from the PRM analysis (FDR < 0.05); ATG9A, YTHDF3, ABHD5, EHD1, and AP2B1 (Fig. 7, Supplementary Table 4). This evidence concerns the gene YTHDF3 and Parkinson disease.