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:  Amniotic fluid ionic concentration in response to chronic fetal vasopressin infusion .

Output: fetal vasopressin


Input: Consider Input:  In K562 cells , using the bicistronic vector , selection with colchicine led to at least 20 - fold higher expression of the MDR1 gene product than did selection with G418 , suggesting that the stringent MDR1 selection system is very efficient for obtaining overexpression of foreign genes .

Output: MDR1 gene product


Input: Consider Input:  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 .


Output: TTF - 1