I have a problem in using U6 as a house keeping in determining miRNA levels in Caco-2 cells infected with rotavirus. There are different expression in the control (Caco-2 cells derivatives samples) than from Caco-2 celles infected with rotavirus. For this I will use another housse keeping miR. Could somebody to help me in giving me advise about anothers house keeping to be use in miR analysis in epithelial cells?.