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 Input:
In addition , caspase - 3 , an executioner of apoptosis , was activated and its substrate , poly ( ADP - ribose ) polymerase ( PARP ) , was cleaved during 2 , 2 ' , 4 , 6 , 6 ' - PeCB - induced apoptosis .

Ex Output:
caspase - 3

Ex Input:
Constitutively activated Akt - 1 is vital for the survival of human monocyte - differentiated macrophages .

Ex Output:
Akt - 1

Ex Input:
The cytoplasmic domain of 2B4 associates with src homology 2 domain - containing protein or signaling lymphocyte activation molecule - associated protein , whose mutation is the underlying genetic defect in the X - linked lymphoproliferative syndrome .

Ex Output:
cytoplasmic domain