Figure 1
From: No evidence of association between human cytomegalovirus infection and papillary thyroid cancer
Real-time quantitative PCR amplification and standard curve of CMV DNA copy numbers. Upper panel: Threshold cycle (Ct) values are obtained from amplification plots which indicate the change in normalized signal for the four standards between cycles 20 and 40 of the PCR. Ct is the cycle at which fluorescence crosses a threshold value. Lower panel: The standard curve of Ct versus logarithmic DNA copy number. Correlation coefficient is indicated.