(A) α-Synuclein, CSPα, VAMP2 and SNAP-25 were immunoblotted in total brain homogenates and/or synaptosomal fractions of 1.5 month-old WT (CSPα+/+/α-syn+/+), CSPα-/-, CSPα+/-, α-syn-/-, α-syn+/- and CSPα+/-/α-syn+/-. Synapsin-1 was also blotted as a control. Quantitation of WB in synaptosomal samples was shown. 