The Powerhouse (IMAGE) University of Pennsylvania School of Medicine Caption The mitochondrial matric calcium ion concentration regulates activity of the major mitochondrial calcium influx pathway, as measured by patch clamp physiology. Credit The lab of Kevin Foskett, PhD, Perelman School of Medicine, University of Pennsylvania 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.