Membranes were then probed with primary antibodies: mouse monoclonal for Bcl-XL, MCL-1 (Santa Cruz Biotechnology), cytochrome c (BD Biosciences, Le Pont de Claix, France), HtrA2/Omi (RnD Systems, Lille, France), rabbit monoclonal for cleaved caspase-3 (Cell Signaling Technology, Inc, ...