MicroRNA Clusters (IMAGE) Stowers Institute for Medical Research Caption These are MicroRNA clusters expressed from imprinted Gtl2 locus maintain adult hematopoietic stem cells through suppression of mitochondrial biogenesis and metabolic activity. Credit Linheng Li Lab Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.