sentence: DTX3 , B2M , MRPL19 and PPIA showed the minimum of variability in the confidence interval hence can be used for normalisation.In their study to identify EC genes to monitor enterocyte differentiation and to compare normal and adenocarcinoma of the colon from microarray data , Dydensborg et al [ 5 ] recommended RPLP0 for normalising gene quantification in human intestinal epithelial cells and B2M for studying gene expression in human colon cancer .