Histogram showing expression levels of three genes (Rps29, Chgb and Ins2) in 101 β-cells. Overlaid curves show the total technical noise levels for RT-qPCR measurements. The biological noise, which can be interpreted as normalized width of each histogram, is 1.0, 0.33 and 1.4 for Rps29, Chgb and Ins2 respectively.
Bengtsson et al. BMC Molecular Biology 2008 9:63 doi:10.1186/1471-2199-9-63