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.

Ex Input:
 gp170 is expressed at a level 30 to 50 % of the Env precursor gp130 .

Ex Output:
Env precursor


Ex Input:
 Promoter elements and transcriptional control of the mouse acetylcholinesterase gene .

Ex Output:
mouse acetylcholinesterase gene


Ex Input:
 We suggest that this effect of Myc is mediated by its action upstream of cyclin E - CDK2 , and occurs via the neutralization of p27 ( Kip1 ) family proteins , rather than induction of Cdc25A .

Ex Output:

cyclin E