Image (IMAGE) Science China Press Caption Genetically-encoded X-ray-sensitive tags for site-specific imaging of protein in cells. a, Schematic showing of APEX2 as genetically encoded tags for protein localization with XRM. Through using fusion expression plasmids including APEX2 and biotargets, they have high specificity. Following catalyzing the polymerization of DAB into localized X-ray visible dense DAB polymers, they localize and image various cellular targets with high resolution. b, XRM images of cellular proteins and specific amino acid sequence: COX4 (mitochondrial), Cx43, α-tubulin, β-actin, NLS and GalT. Scale bars: 10 μm. Credit ©Science China Press Usage Restrictions Use with credit. 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.