Figure 2

Average expression stability values of tested potential internal control genes (ICGs). Average expression stability values (M) of remaining ICGs and determination of the optimal number of genes for normalization performed by geNorm, measured in n = 106 fetal sheep liver samples. The x axis indicates the ranking of the ICGs from least (left) to most (right) stable. The pairwise variation indicates the increase in normalization factor reliability by adding additional less stable ICGs.