Figure 1From: Comparison of different methods to obtain and store liver biopsies for molecular and histological researchDetermination of the optimal number of reference genes for normalization. The GeNorm program calculates average expression stability (M) and the expression stability value by the calculation of the pair wise variation. For example V5/V6 indicates the variation in normalization factor with 5 versus 6 reference genes. A and C: Menghini NaCl. B and D: Menghini water.Back to article page