A Green BODIPY-Based, Super-Fluorogenic, Protein-Specific Labelling Agent.

We report the development of YC23, a novel green BODIPY-based dimaleimide derivative that undergoes a fluorogenic addition reaction (FlARe) with a genetically encodable peptide tag (dC10α) that can be fused to a protein of interest (POI). We also demonstrate the application of this reaction for the fluorogenic labelling of a specific POI in bacterial lysate and in living mammalian cells.