Mitochondria (image) University of Pennsylvania School of Medicine Share Print E-Mail Caption These are mitochondria (orange) in close contact with endoplasmic reticulum. The flashes are the localized release of calcium through the IP3 receptor from the endoplasmic reticulum that is taken up by mitochondria to promote the production of ATP. Credit The image is modified from the original artwork of Odra Noel, with her permission (http://www.odranoel.eu). Usage Restrictions None Share Print E-Mail 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.