WT SV40 MEF is a fibroblast cell line that was isolated from a mouse embryo. It can be paired with MEF cell lines, generated from BCL-2 family member knockout mice (eg, ATCC CRL-2908, ATCC CRL-2909, ATCC CRL-2910, ATCC CRL-2911, ATCC CRL-2912, ATCC CRL-2913), as a control to study the molecular mechnaisms of cell apoptosis and the BCL-2 family signaling pathway. This cell line was deposited by S Korsmeyer.