Figure 1. Syntaxins PEN1 and SYP122 differ in sensitivity to BFA. Roots expressing functional GFP-PEN1 (A and C) or YFP-SYP122 (B and D), were stained with FM4- 64 for 1 h without (A-B) or with 50 μM BFA (C-D). Scale bars are equivalent to 5 μm.