RAB38 and Parkinson disease: Overexpressed HA-Rab29 increased phosphorylation of S1292-LRRK2 and T73-Rab10 by WT or PD-mutant (R1441G or G2019S) GFP-LRRK2 (Figs. 1A and S1A), consistent with Purlyte et al. (11) HA-Rab32 or HA-Rab38 did not significantly increase pS1292-LRRK2 of WT or PD-mutant GFP-LRRK2, also consistent with Purlyte et al. (Fig. S1A).