24507
A 5 ' flanking region of Gonadotropin Regulated Testicular RNA Helicase ( GRTH / DDX25 ) gene directs its cell specific androgen regulated gene expression in testicular germ cells .
 androgen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 androgen