A Mechanism for Change (IMAGE) Brown University Caption Common yeast cells like these are able to change from the "a" to the "alpha" type by removing a protein that prevents certain genes from being expressed. Understanding that mechanism could lead to new interventions in pathologies where the cell transformation process goes wrong. Credit Jeffrey Laney / Brown University 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.