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.

We demonstrate that , unlike LPS , the safe immunomodulator MB selectively activates extracellular signal - regulated kinases ( Erk ) 1 / 2 , in the absence of detectable Jun N - terminal kinase ( JNK ) or p38 mitogen - activated kinase activation .
N - terminal