2365
However , the molecular mechanisms by which specific cis - and trans - acting factors control activity of the prodynorphin promoter are not as clearly defined .
 GENE: prodynorphin 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: prodynorphin promoter