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Protein expression of (A) CD9, (B) CD63, and (C) CD81 in purified small extracellular vesicles (sEVs) from controls (n = 12) and participants with Parkinson’s disease (PD; n = 16). Data were normalized for the amount of sEV total proteins and are shown as percentage of the control group set at 100%. Bars represent mean values (± standard deviation of the mean). Representative blots are shown in Figure S1. * p = 0.0001 vs. controls.
