Supplementary Figure 1: Firre is a stable transcript.
From: Topological organization of multichromosomal regions by the long intergenic noncoding RNA Firre
(a) Cloning of 50 different mouse isoforms of Firre, with most exons demarcated by the inclusion of the repeat domain RRD (purple tracks). (b) The isoform assemblies for human FIRRE are shown, again with most exons marked by RRD (purple marks). (c) Actinomycin-D treatment of male mESCs followed by RNA FISH for Firre over a course of 6 hours. (d) The number of nascent versus mature transcripts counted by image processing in Matlab.
