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:
 At 1 . 25 micromol / L , sulfasalazine largely inhibited NF - kB activation in dendritic cells .

Ex Output:
NF - kB


Ex Input:
 The mechanism of reducing NO production resulting from inhaled NO may involve , in part , the activities of reactive oxygen species and / or nuclear factor - kappaB .

Ex Output:
nuclear factor


Ex Input:
 Here , we demonstrate that engineered down - regulation of HIF - 1alpha by intratumoral gene transfer of an antisense HIF - 1alpha plasmid leads to the down - regulation of VEGF , and decreased tumor microvessel density .

Ex Output:

HIF - 1alpha