XIAP and breast cancer: Choi et al. reported that treatment of BC cells (MDA‐MB 231) with sanguinarine (0–1.5 μM) caused apoptosis by generating ROS, leading to the transfer of cytochrome‐c into cytosol followed by caspase‐3 and caspase‐9 activation and inactivation of anti‐apoptosis factor XIAP and cIAP‐1.114