3294
Effectively , the upstream , housekeeping - type promoter responds to FIXK and positively regulates the downstream , sigma 54 - type promoter .
 GENE: FIXK; GENE: sigma 54 - type promoter
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: FIXK; GENE: sigma 54 - type promoter