fig2

Figure 2. Effect of 6-PPDQ exposure on arginine absorption. (A) Effect of 6-PPDQ exposure on expression of intestinal aat-1 and C50D2.2. Thirty intact intestines were isolated for qRT-PCR analysis. ^**P < 0.01 vs. control. (B) Effect of intestinal RNAi of aat-1 and C50D2.2 on arginine content in 6-PPDQ-exposed nematodes. Exposure concentration of 6-PPDQ was 10 μg/L. ^**P < 0.01 vs. VP303(L44440). 6-PPDQ: N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine quinone; aat-1: amino acid transporter 1; qRT-PCR: quantitative real-time polymerase chain reaction.