XIAPBIR2 BIR2-3 Inhibitor-3 functions as a dual inhibitor targeting both BIR2 and BIR2-3 domains, exhibiting potent activity with IC50 values below 1 nM. This compound is utilized in cancer research [1].
SM-164 Hydrochloride is a cell-permeable Smac mimetic compound. SM-164 binds to XIAP protein containing both the BIR2 and BIR3 domains(IC50 value of 1.39 nM) and functions as an extremely potent antagonist of XIAP.