Figure 4From: A cryptic promoter in potato virus X vector interrupted plasmid constructionComparison of the activity of the cryptic promoter and the T7 promoter using Real-time RT-PCR. The average activity of the cryptic promoter (value: 2.4) is higher than that of the T7 promoter (value: 1). The 16S rRNA was the housekeeping gene in this study.Back to article page