ADCs Toxins, Exhibits antifungal and cytotoxic activity against some tumor cell lines partly attributed to inhibition of Ras-inducible genes. Inhibits proliferation of mouse and human T cells and modulates production of cytokines during T cell activation. Facilitates the ubiquitinylation process of cyclin D1. Has been identified as a potent and selective inhibitor of threonine/tyrosine-specific kinase, MEK, and other protein kinases that contain a conserved cysteine residue in the ATP-binding site in both in vitro and in vivo studies. HCT-116: IC50=0,0026 uM; PSN1 : IC50=0,26 uM; T98G : IC50=2,6 uM; A549 : IC50=0,26 uM (preliminary laboratory results). Journal of Natural Products (2011), 74(5), 1126-1131.