protein bcl 2 apoptosis 98 Apoptosis 92 controlled study 90 article 86 priority journal 84 nonhuman 76 Animals 72 protein expression 72 animal cell 56 Female 52 human 52 protein Bax 50 Humans 48 female 48 Rats 40 caspase 3 38 rat 36 Proto-Oncogene Proteins c-bcl-2 34 animal experiment 34 cell proliferation 34 human cell 34 signal transduction 34 Mice 28 Rats, Sprague-Dawley 28 cell survival 28 mouse 28 Cell Line, Tumor 24 Male 24 immunohistochemistry 24