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.

Indeed , TCF - 1 binds to two sites in the Ly - 49a promoter and regulates its activity , suggesting that the Ly - 49a gene is a direct TCF - 1 target .
Output:
TCF - 1