Fig. 3. Evaluation of the sensitivity of the three different plasma DNA quantitative assays. The statistically significant correlations of DNA levels of 10-fold serial diluted plasma samples (X-axis, common logarithmic scale) with quantitative results (Y-axis, common logarithmic scale) determined by the novel duplex real-time PCR assay with (A) internal standard, (B) the single real-time PCR assay with external standards, and (C) the dye PicoGreen assay.
