9925
In a reconstituted human DNA repair system containing DNA polymerase beta and DNA ligase III - XRCC1 , accurate rejoining of a 3 ' mismatched base residue at a single - strand break is dependent on addition of the exonuclease .
 DNA polymerase beta, DNA ligase III, XRCC1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 DNA polymerase beta, DNA ligase III, XRCC1