The development of Tat clusters has advanced the intracellular delivery of functional antibodies at low concentrations, but the variety of proteins that can be successfully delivered remains limited. Here, the authors report that by reversibly modifying the surface of functional proteins with anionic peptides, various protein cargoes (otherwise difficult to deliver) can be delivered into living cells by synergetic electrostatic interactions with the cationic cell-penetrating peptide clusters TAT3.
- Xiao Hua
- Yanyan Guo
- Yi-Ming Li
