Comparative gene expression levels between VA and NTVA libraries. The occurrence number of each tag (normalized in tag per million) in VA (X axis) and NTVA (Y axis) libraries is represented on a logarithmic scale. Each point can represent one or more tags. Colour-coding is based on a statistical analysis (Z test ), adjusted for multiple testing according to the method proposed by Benjamini and Hochberg . Black dots represent the 110 tags having an adjusted p-value < 0.1. These tags correspond to genes that are significantly differentially expressed between these 2 conditions. Among these genes, 44 are up-regulated (the corresponding points are located below the first bisecting line) and 66 are down-regulated (the corresponding points are located above the first bisecting line) in T2ECs expressing the transforming form of v-ErbA as compared to T2ECs expressing the non-transforming form of v-ErbA. The gray dots represent all the other tags.