11639
Multiple copies of rsmB + DNA , on the other hand , stimulate exoenzyme production by relieving the negative effects of a chromosomal copy of hexA + .
 rsmB + DNA, hexA +
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 rsmB + DNA, hexA +