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.

Input: Consider Input: Antibodies specific to the different members of the Jun and Fos family of transcription factors show that , in gel retardation assays , a Jun - like factor is a component of the H3 . 2 specific complex .

Output: Fos family

Input: Consider Input: Cloning of the GATA - binding protein that regulates endothelin - 1 gene expression in endothelial cells .

Output: endothelin - 1

Input: Consider Input: 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 .
Output: E2F family members