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.

Example Input:  Human normal peripheral blood B - lymphocytes are deficient in DNA - dependent protein kinase activity due to the expression of a variant form of the Ku86 protein .
Example Output: Ku86 protein

Example Input:  Thus , Th2 - specific GATA - 3 expression and p38 mitogen - activated protein kinase activation together provide a molecular basis for the differential effects of cAMP in the two T helper cell subsets .
Example Output: GATA - 3

Example Input:  Our findings of distinct signal transducer requirements , with the added consequences of cross - talk , offers an explanation for variable modulation of costimulatory molecule expression in response to diverse physiological stimuli .
Example Output:
costimulatory molecule