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]:  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 ) .
[EX A]: IL - 2

[EX Q]:  Excess labeled steroid as well as most non - specifically bound steroid is easily washed away , leaving the hormone - receptor complex retained by the beads .
[EX A]: receptor complex

[EX Q]:  Both NF - kappaB - like elements were able to bind to NF - kappaB or its related factor ( s ) in a Tax - dependent manner .
[EX A]:
NF - kappaB