You will be given a definition of a task first, then some input of the task.
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.

 Electrophoretic - mobility - shift assays showed that the core promoter ETS motif binds an Ets - related protein specifically expressed at high levels in CD4 + cells .
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
core promoter