Mitochondria illustration (IMAGE) Whitehead Institute for Biomedical Research Caption MTCH2 acts as a doorway for proteins into the outer mitochondrial membrane. Credit Maria Guna Usage Restrictions Must credit Maria Guna License Original 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.