(a) α-syn immunoblot of rat liver lysosomes incubated with WT or mutant (A53T) α-syn alone (−) or with WT LRRK2 or G/S LRRK2. Inp, input; Mon, monomers. Right: quantification of α-syn oligomers, expressed as a multiple of amounts in samples without LRRK2 (n = 4 or 5 independent experiments). 