11941
In this manuscript we demonstrate that two tandem Ets sites in the mouse GL alpha promoter bind the transcription factors Elf - 1 and PU . 1 , and that the 3 ' site is essential for expression of a luciferase reporter gene driven by the GL alpha promoter .
 tandem Ets sites, mouse GL alpha promoter, transcription factors Elf - 1, PU . 1, luciferase reporter gene, GL alpha promoter
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 tandem Ets sites, mouse GL alpha promoter, transcription factors Elf - 1, PU . 1, luciferase reporter gene, GL alpha promoter