697
The use of sigma 54 promoters , known to require cognate binding proteins , could allow the fine - tuning that provides the temporal ordering of flagellar gene transcription .
 GENE: sigma 54 promoters
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: sigma 54 promoters