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.

[Q]:  Activated STAT3 was shown to bind an SIE - related element in the murine mcl - 1 promoter .
[A]: Activated STAT3


[Q]:  Reactivity with the tegument protein encoded by UL21 was identified for an additional patient .
[A]: tegument protein


[Q]:  Within this fragment , three nucleic acid sequences are completely conserved in the murine CD4 gene .
[A]:
murine CD4 gene