RAB23 and multiple system atrophy: We further performed immunoblotting on the human brains [control (n = 6) and DLB (n = 6); control (n = 6) and MSA (n = 6)] using antibodies against SYT13, SNAP25, Piccolo, Rab23, Rab11b, Rab7, Rims3, Rims4, VTI1A and Exophilin5 (Fig. 3s).