Discovering, Counting, Cataloguing Proteins (IMAGE) University of Freiburg Caption This is a schematic illustration of quantitative measurements of mitochondrial building blocks using mass spectrometry. Credit Artwork: Christian D. Peikert 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.