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:  Thus , the behavior of ZEBRA in human B cells and S . cerevisiae suggests that the protein contains universal activation motifs that interact with conserved components of the transcription machinery .

A: universal activation motifs
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Q:  These data suggest that the IL - 2 and CD3 signaling pathways provide a necessary and co - operative stimulus promoting phosphorylation of CREB following receptor cross - linking .

A: IL - 2
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Q:  These results suggest that TCF - 1 does not target human killer immunoglobulin receptor genes , TCF - 1 is uniquely expressed in circulating CD56 ( + bright ) NK cells , and specific TCF - 1 isoforms may play an important role in regulating NK differentiation from a common NK / T - cell progenitor .

A:
TCF - 1
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