Navitoclax (ABT-263) is a potent inhibitor of Bcl-xL, Bcl-2 and Bcl-w with Ki of ? 0.5 nM, ?1 nM and ?1 nM in cell-free assays, but binds more weakly to Mcl-1 and A1. Phase 2. *For Research & Development use only. Product is not intended for drug, household, or human consumption.