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.

Example Input:  In contrast to B cells from XID mice , B cells from JAK3 knockout mice showed a normal STAT5A phosphorylation response to anti - IgM stimulation .
Example Output: anti - IgM

Example Input:  The trans - activator protein Tax of human T - cell leukemia virus type I ( HTLV - I ) plays an important role in the development of adult T - cell leukemia through , at least in part , its ability to stimulate cell growth .
Example Output: trans - activator

Example Input:  EBV - specific CTL were then generated in vitro by stimulating PBL with autologous EBV - transformed B cells ( EBV - B ) in the presence or absence of autologous BMC .
Example Output:
- B