Novel lncRNA Protects Embryo from Viruses (IMAGE) University of Pennsylvania Caption A new University of Pennsylvania study found that placental cells are rich with lncRHOXF1 (red), which appears to offer the developing embryo protection from viruses. Credit University of Pennsylvania Usage Restrictions In context of reporting 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.