Cell (IMAGE) University of Montreal Caption This is a cell where the Parkinson's disease-related protein PINK1 is absent is in the process of presenting mitochondrial antigens (in red) at its surface to alert the immune system. Intact mitochondria are observed as rod-like structures in green. Credit CELL 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.