Figure 1From: Evaluation of external RNA controls for the standardisation of gene expression biomarker measurementsCharacterisation of platform signal output using RNA standards. Signal output data for all eight standards across a tested range between 0 and 106 copies/ng total RNA are shown as box-whisker diagrams for microarray (white bars) and RT-qPCR (grey bars) applications. Median signal output (central line), interquartile range and minimum and maximum values are shown for each level of transcript abundance.Back to article page