Induction ofp5n-I,caII, and β-globinexpression of day-11 RBCs during 24 hours with or without 10 μM NE. (A) RT-PCR results of a representative experiment; (B-D) EtBr fluorescence of the RT-PCR products of 3 independent experiments (mean and SD). (E) P5N-I enzyme activity was plotted together with the p5n-I expression (data from panel C; dashed line) during a 24-hour incubation. The mean and SD of 4 experiments are shown. Significant difference compared with the control (t₀); ^* indicates P < .05, and ^**P < .01.