Gambogic acid is a natural product isolated from the resin of Garcinia hurburyi tree, Gambogic acid is a potent apoptosis inducer. It binds covalently to the regulatory subunit B (SPTSSB) of the serine palmitoyltransferase complex and inhibits de novo sphingolipid biosynthesis. Gambogic acid activates caspases in T47D breast cancer cells and inhibits binding of anti-apoptotic proteins to a BH3 peptide. Reagent grade, for research purpose.