Figure 4From: Differential susceptibility of PCR reactions to inhibitors: an important and unrecognised phenomenonThe effect of EDTA concentration on different qPCR reactions n.b. Data plotted as median ± highest and lowest (triplicate reaction), failure of reaction to amplify is represented on graph by a Ct of 45. The control reactions without addition of EDTA gave a Ct value of 28 cycles.Back to article page