Inhibitor of protein kinase C (PKC) ζ; attached to cell permeabilisation Antennapedia domain vector peptide. Consists of amino acids 113 - 129 of PKC ζ pseudosubstrate domain linked by a disulphide bridge to the Antennapedia domain vector peptide. The Antennapedia peptide is actively taken up by intact cells, at 4 or 37°C, ensuring rapid and effective uptake of the inhibitor peptide. Once inside the cell, the disulphide bonds are subjected to reduction in the cytoplasm leading to release of the inhibitor peptide. Induces mast cell degranulation by a PKC ζ-independent pathway.

Isocucurbitacin D showed a cytotoxic effect with disruption of target protein cofilin.

(R)-HH2853 is a potent EZH2 inhibitor with an IC50 <100 nM for EZH2-Y641F.(R)-HH2853 has anticancer and antitumor activity and can be used in autoimmune diseases.