6323
The scr regulon of pUR400 and the chromosomally encoded scr regulon of Klebsiella pneumoniae KAY2026 are both negatively controlled by a specific repressor ( ScrR ) .
 scr regulon, chromosomally encoded scr regulon of Klebsiella pneumoniae KAY2026, ScrR
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 scr regulon, chromosomally encoded scr regulon of Klebsiella pneumoniae KAY2026, ScrR