Mass spectrometry (IMAGE) Charité - Universitätsmedizin Berlin Caption Mass spectrometry makes it possible to create a detailed protein profile of the cancer cells. Shown here is the ion source of a liquid chromatography–mass spectrometry (LC–MS) system. A thin glass tip is used to transfer the specimen being analyzed to the opening of the mass spectrometer. Credit © Pablo Castagnola l Max Delbrück Center Usage Restrictions None. License Original 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.