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Screening for highly active fragments of the TcEH/TcEHL promoter.A, transcriptional activity of the TcEH progressive deletion promoter was detected using a Dual-Luciferase reporter system. B, transcriptional activity of the TcEHL progressive deletion promoter was detected using the Dual-Luciferase reporter system. The pGL3-basic plasmid was used as a control. Data were presented as the mean ± standard errror (one-way ANOVA, Tukey's, p < 0.05, n = 3).
