Intracellular click reaction with a fluorescent chemical Ca2+ indicator to prolong its cytosolic retention†
Abstract
The powerful strategy of “intracellular click reaction” was used to retain a chemical Ca2+ indicator in the cytosol. Specifically, a novel clickable Ca2+ indicator “N3-fura-2 AM” was coupled with dibenzylcyclooctyl-modified biomacromolecules via copper-free click reaction in living cells and Ca2+ oscillation was observed for an extended period of time.