instruction:
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.
question:
 Macrophage stimulation with Murabutide , an HIV - suppressive muramyl peptide derivative , selectively activates extracellular signal - regulated kinases 1 and 2 , C / EBPbeta and STAT1 : role of CD14 and Toll - like receptors 2 and 4 .
answer:
C / EBPbeta


question:
 In conclusion , ( 1 ) somatic BCL - 6 mutations are restricted to cHD cases of B - cell origin , and ( 2 ) the BCL - 6 mutations represent mostly irrelevant somatic base substitutions without consequences for BCL - 6 protein expression and the pathogenesis of cHD .
answer:
BCL - 6


question:
 To understand the mechanisms underlying the cell - type - specific expression of this gene , we have characterized the regulatory functions and the DNA - protein interactions of the 5 ' - flanking region of the mouse perforin gene ( Pfp ) .
answer:

mouse perforin gene