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.

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

 Troglitazone , a PPARgamma ligand , dramatically attenuated the PMA - induced osteopontin expression .
PPARgamma ligand

 It has been previously reported that IL - 2 release in activated Jurkat T requires caspase - like activity ( Posmantur et al . ( 1998 ) Exp . Cell . Res . 244 , 302 - 309 ) .

IL - 2