In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

 In contrast to the p16 - mediated G1 block , G1 arrest mediated by the cdk inhibitors p21Cip1 or p27Kip1 cannot be bypassed either by inactivation of pRb or overexpression of E2F family members .
E2F family members

 Here we show that one nudF suppressor also suppresses hs - mutations in nudA , nudC , and nudG and deletions in nudA and nudF .
nudF suppressor

 Western blot analyses reveals that cJun and the C / EBP family member C / EBP - beta are physiologically relevant transcription factors whose expression corresponds with mda - 7 mRNA expression .

C / EBP