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]:  The MEF - 2 proteins are a family of transcriptional activators that have been detected in a wide variety of cell types .
[A]: MEF - 2


[Q]:  On the basis of experiments with mutant virus and transfection with isolated genes , the herpes simplex virus immediate - early gene product ICP4 is known to positively regulate the transcription of viral early and late genes and negatively regulate expression from its own promoter .
[A]: early gene


[Q]:  Fli - 1 is a proto - oncogene which is rearranged in tumors induced by three different retroviruses , Cas - Br - E , F - MuLV , and 10A1 .
[A]:
Fli - 1