4371
Binding of the TorR regulator to cis - acting direct repeats activates tor operon expression .
 GENE: TorR regulator; GENE: tor operon
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: TorR regulator; GENE: tor operon