The idea that chemical tags on genes can affect their expression without altering the DNA sequence, once surprising, is the stuff of textbooks. The phenomenon, epigenetics, has now come to messenger RNA (mRNA), the molecule that carries genetic information from DNA to a cell’s proteinmaking factories. Researchers discuss evidence that RNA epigenetics is also critical for gene expression and disease, and they described a new chemical modification linked to leukemia.https://www.sciencemag.org/news/2019/07/hidden-layer-gene-control-influences-everything-cancer-memory Hidden Layer Of Gene Control Influences Everything From Cancer To Memory