6671
Both EWS - FLI - 1 and FLI - 1 proteins function as transcription factors that bind specifically to ets sequences ( the ets boxes ) present in promoter elements .
 EWS, FLI - 1, FLI - 1 proteins, ets, ets
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 EWS, FLI - 1, FLI - 1 proteins, ets, ets