Fig. 9From: Selecting suitable reference genes for qPCR normalization: a comprehensive analysis in MCF-7 breast cancer cell lineNormalized fold change in expression of genes of interest (a) AURKA and (b) KRT19 in stress cultures (B5, D5, E5 and R5) when compared with control cultures (A1 and A2). Pink boxes indicate normalized fold change in expression when compared with p28 (culture A1); Blue boxes indicate normalized fold change in expression when compared with p25 (culture A2) and Green boxes indicate normalized fold change in expression when compared with control MCF-7 cell line (p28 + p25 from A1 and A2). * Indicates significant fold change (P < 0.005) as calculated using Mann-Whitney U testBack to article page