Figure 3From: Determination of reference genes for circadian studies in different tissues and mouse strainsOptimal number of reference genes used for normalization. geNorm determination of the optimal number of reference genes based on the pairwise variation value (V n/n+1 ) that is calculated between two sequential normalization factors [20]. The optimal number of reference genes was calculated for liver and adrenal glands where samples from all mouse strains are included.Back to article page