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 also detected a DNA - protein interaction that may be involved in the cell - type specificity of immunoglobulin expression , and we have determined that a sequence upstream of the octamer participates in an interaction with a nuclear protein ( s ) .
[EX A]: nuclear protein

[EX Q]:  The inhibition was induced by interaction with macrophages that had contacted with P . berghei - infected erythrocytes and was mediated by a soluble factor , IL - 10 .
[EX A]: IL - 10

[EX Q]:  OBJECTIVE : Carrier identification in X - linked immunodeficiency disorders can be based on the demonstration of non - random X inactivation ( NRXI ) in affected blood cell lineages when growth is impaired in cells expressing the abnormal gene .
[EX A]:
abnormal gene