24941
Notably , the known and predicted TF dimers were almost always highly compact and rigidly spaced , suggesting that TFs dimerize in close proximity to their partners , which results in strict constraints on the structure of the DNA - bound complex .
 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