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]:  Thus , it was concluded that C / EBP alpha and - beta were able to bind to the C / EBP motif , and that C / EBP alpha bound to the motif in THP - 1 cells and C / EBP beta bound to that in the VD3 - treated HL - 60 cells .
[EX A]: C / EBP

[EX Q]:  T cells retained their physical parameters as measured by forward and side light scatter , and functional activity as measured by costimulation of proliferation and IL - 2 production after being scraped off this substrate .
[EX A]: IL - 2

[EX Q]:  In contrast , vaccination with a peptide encoding an adenovirus type 5 ( Ad5 ) E1A CTL epitope results in CTL tolerance and enhanced growth of an Ad5 E1A - expressing tumor .
[EX A]:
Ad5 E1A