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. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: Semin Cell Dev Biol. 2010 Feb 10;21(7):760–767. doi: 10.1016/j.semcdb.2010.02.003

Figure 1.

Figure 1

miRNAs regulate developmental transitions. Onset of miRNA activity (in blue cell) can serve to remove mRNAs that originate from a previous transcriptional stage (red), as well as tune the expression levels of actively transcribed genes (green).