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]:  Uptake of colicins required different domains in TonB , for colicin B and M around residue 160 and for colicin Ia , a domain closer to the C - terminal end .
[EX A]: colicin Ia

[EX Q]:  Some CHOP - C / EBP heterodimers apparently bind to alternative DNA sequence and thereby regulate the transcription of other genes .
[EX A]: C / EBP

[EX Q]:  Various stimuli inactivate IkappaB alpha by triggering phosphorylation of the N - terminal residues Ser32 and Ser36 .
[EX A]:
IkappaB alpha