Fig. 4From: Selection and validation of reference genes for quantitative expression analysis of miRNAs and mRNAs in PoplarRelative expression of miR166 and PtHB4 using validated reference genes for normalization under plant regeneration process. The validated reference gene(s) used as normalization factors were one (U6-1, EIF4A, PP2A-2 alone) or two (U6-1 + EIF4A and U6-1 + PP2A-2) of three best stable reference genes and two most unstable reference genes (5.8s and miR403)Back to article page