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]:  Here we demonstrate that the T cell antigen receptor zeta - chain - associated ZAP - 70 kinase and T cell antigen receptor zeta - chain immunoreceptor tyrosine - based activation motifs are essential for the membrane recruitment of SOS and Vav .
[EX A]: ZAP - 70

[EX Q]:  The c - raf - 1 proto - oncogene is the cellular homologue of v - raf , the oncogene of the acutely transforming retrovirus 3611 - MSV .
[EX A]: v - raf

[EX Q]:  The major promoter element of the Xenopus laevis 5S RNA gene is located within the transcribed region of the gene and forms the binding site for the transcription initiation factor TFIIIA .
[EX A]:
5S RNA