Janus Gamma Peptide Nucleic Acid (IMAGE) Carnegie Mellon University Caption Developed by researchers at Carnegie Mellon University, this janus gamma peptide nucleic acid (PNA) can invade the double helix of DNA and RNA. Credit Carnegie Mellon University Usage Restrictions Credit: Carnegie Mellon University 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.