Click Chemistry Reaction (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption A version of click chemistry with an azide-based fluorophore (green star) and a BTTES-based copper catalyst was shown to be target specific, fast-working and safe for the fluorescent labeling og glycans in living cells. Credit Yi Liu, Berkeley Lab Molecular Foundry 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.