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]:  The functional importance of the other binding sites only became apparent when combinations of mutations were analyzed .
[EX A]: binding sites

[EX Q]:  The apparent paradox of heightened adrenal corticosteroid levels associated with reduction in the competence of the body ' s defensive apparatus to cope with exposure to new microbial antigens is considered .
[EX A]: microbial antigens

[EX Q]:  However , at 24 hours , STAT4 heterodimerisation with STAT 3 was only observed in spleen .
[EX A]:
STAT 3