2313
We have examined the role of two recombination - and repair - defective mutations , rad1 and rad52 , on direct repeat recombination in transcriptionally active and inactive sequences .
 rad1, rad52
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 rad1, rad52