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 Q]:  We found that leukemic LGL from 19 patients displayed high levels of activated STAT3 .
[EX A]: activated STAT3

[EX Q]:  However , similar to what was observed after p38 kinase inhibition in normal mice , relative ATF - 2 deficiency did not prevent the development of a mononuclear cell infiltrate in the week following an inflammatory stimulus .
[EX A]: ATF - 2

[EX Q]:  The purpose of this study was to evaluate the in vitro activity of the principal metabolites of ATRA [ 4 - hydroxy - retinoic acid ( 4 - OH - RA ) , 18 - hydroxy - retinoic acid ( 18 - OH - RA ) , 4 - oxo - retinoic acid ( 4 - oxo - RA ) , and 5 , 6 - epoxy - retinoic acid ( 5 , 6 - epoxy - RA ) ] in NB4 , a human promyelocytic leukemia cell line that exhibits the APL diagnostic t ( 15 ; 17 ) chromosomal translocation and expresses the PML - RAR alpha fusion protein .
[EX A]:
fusion protein