Definition: 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.
Input:  In cells co - expressing high levels of the p38 ( MAPK ) kinase ( MKK3 ) together with the p38 ( MAPK ) , a significant inhibition of mitogen - induced cyclin D1 expression was observed .
Output:
cyclin D1