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:
 To investigate the role of costimulation of OX40 in human immunodeficiency virus type 1 ( HIV - 1 ) infection by its natural ligand , gp34 , the OX40 - transfected ACH - 2 cell line , ACH - 2 / OX40 , chronically infected with HIV - 1 , was cocultured with paraformaldehyde ( PFA ) - fixed gp34 - transfected mouse cell line , SV - T2 / gp34 .

Ex Output:
HIV - 1


Ex Input:
 We show here that Bright has multiple contextual requirements to function as a transcriptional activator .

Ex Output:
transcriptional activator


Ex Input:
 As an initial step towards understanding the molecular basis for tissue - specific expression of this gene , we surveyed the surrounding chromatin structure for potential cis - acting regulatory regions by DNase I hypersensitivity mapping and found four hypersensitive sites , three of which were T cell restricted .

Ex Output:

DNase I