Protein expression (IMAGE) Northwestern University Caption Ph.D. candidate Vasin Dumrongprechachan captures protein expression in the mouse brain for mass spectrometry analysis, visualized by fluorescence microscopy. Images shows a sagittal cross section of the mouse striatum. Blue is the outline of the brain. Green and magenta show selectively tagged proteins for mass spectrometry analysis. Credit Northwestern University Usage Restrictions Please credit Northwestern University 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.