8241
The Fis protein regulates site - specific DNA inversion catalyzed by a family of DNA invertases when bound to a cis - acting recombinational enhancer .
 Fis protein, DNA invertases
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Fis protein, DNA invertases