24934
However , in order to elucidate the mechanisms of transcriptional regulation , it is essential to determine which TFs bind DNA cooperatively as dimers , and to infer the precise nature of these interactions .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None