Cape fur seal mammary cells require extended exposure of bLALBA for induction of apoptosis. (A – D) 1 mg/ml bLALBA was added to CfsMCs for 1 hour, LALBA was then washed out and fresh media was added. (E – H) For comparison, 1 mg/ml LALBA was added to cell culture media and allowed to remain on the cells. Cells were photographed at day 1 (A and E), day 2 (B and F), day 4 (C and G) and day 5 (D and H). Scale bars represent 100 μm.