Furthermore, the serum levels of Rab35 positively correlate with those of aSyn in PD patients, and the combined assessment of Rab35 and aSyn is a better predictive biomarker for discriminating PD patients from those affected by atypical parkinsonism or from healthy subjects [101], emphasizing the critical interplay between Rabs and aSyn. Here, RAB35 is linked to Parkinson disease.