Assessment of the v-ErbA target gene expression in response to different factors. 6A – Comparison between the v-ErbA and the differentiation target genes. The Venn Diagrams represent a comparison between the list of v-ErbA repressed target genes (this study) and the genes upregulated during T2ECs differentiation  (Left part of the figure) or the list of v-ErbA activated target genes and the genes repressed during T2ECs differentiation (Right part of the figure). 6B – Comparison of v-ErbA, differentiation, T3 and RA target genes. The Venn diagram summarizes the overlap in the sets of genes that were activated or repressed in response to v-ErbA or/and T3 or/and RA or/and during the differentiation process in T2ECs.