Figure 9.

Effects of the NO and/or H₂O₂ generation on DHA reductase. A, Changes in DHA reductase (DHAR) activity over time. The values represent mean ± se of five experiments. * indicates the values that are significantly different from controls (Student's t test with P < 0.01). B, Representative native PAGE of DHA reductase from tobacco cv BY-2 cells treated for 7 h with SNP, GOG, or SNP plus GOG. For each treatment, 300 μg of total proteins was loaded. See Figure 2 for SNP and GOG concentrations.