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 have analyzed the role of the HU protein in invertasome assembly when the enhancer is located at variable positions close to one of the recombination sites .
[EX A]: HU protein

[EX Q]:  Sucrose - specific signalling represses translation of the Arabidopsis ATB2 bZIP transcription factor gene .
[EX A]: bZIP transcription factor

[EX Q]:  Competition and methylation interference assays showed that the binding site for the novel factor was limited to nucleotides in the 3 ' half of the kappa B site .
[EX A]:
kappa B site