<unk>  usually refers to one of two<unk> s transcribed from the<unk>  gene of the<unk> : a 55kDa<unk>  and a 19kDa<unk> . These two<unk> s are needed to block apoptosis in<unk> -infected cells.<unk><unk> s work to prevent apoptosis that is induced by the small<unk> , which stabilizes p53, a tumor suppressor.
Adenovirus E1B protein
SV40 large T antigen
Epstein–Barr virus viral-capsid antigen
Tax gene product
Tumor-associated glycoprotein 72
T independent antigen 
Oncogenic retroviridae protein
Long interspersed nuclear element