English: The figure shows confocal images from a combined RNA-DNA FISH experiment for Xist in female mouse fibroblast cells (Female-biased expression of long non-coding RNAs in domains that escape X-inactivation in mouse, B Reinius et al 2010, BMC Genomics (6), http://www.biomedcentral.com/1471-2164/11/614/abstract). The figure was adapted from Figure 5 in the original publication and contrast was adjusted to make the figure clear in thumbnail format. Open access: Unrestricted use, distribution and reproduction in any medium is permitted, provided the original article is properly cited.