ReACT Swiss Army Knife Illustration (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Researchers have developed a new method of protein ligation, the joining of molecules with proteins. The technique, called Redox Activated Chemical Tagging (ReACT), involves the modification of proteins by attaching chemical cargos to the amino acid methionine. ReACT functions as a new type of chemical Swiss army knife that supports a wide variety of fields, spanning fundamental studies of protein function to applications in cancer treatment and drug discovery. Credit Shixian Lin/Berkeley Lab Usage Restrictions Editorial use only 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.