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: Consider Input:  The number of binding sites was not significantly modified .

Output: binding sites


Input: Consider Input:  The differential usage of this regulatory sequence motif is thought to be mediated by different species of octamer binding proteins .

Output: octamer binding proteins


Input: Consider Input:  In addition , the MAP / Erk kinase kinase inhibitor PD98059 did not abrogate SDF1 alpha - induced chemotaxis .


Output: SDF1 alpha