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.
Q: The present report shows that a cis - acting element between - 189 and - 175 bp , which binds thyroid transcription factor - 1 ( TTF - 1 ) , is involved in both activities .
A:
TTF - 1