(a) Current approach to study impacts of reactive electrophiles on protein of interest (POI) involves treatment of entire cell/proteome with a reactive entity, unavoidably leading to multiple off-target effects. Red, HNE. (b) A new approach to interrogate with biochemical specificity effects of electrophiles on individual proteins. The strategy focuses on a time-resolved targetspecific delivery of electrophiles to a single POI against the entire cell/proteome. The synthetic delivery platform ‘dormant electrophile’ shown has 3 modules: gray, high affinity/specificity ligand to POI; blue, flexible linker; pink, inert warhead – a caged HNE.