1106
Essential features of this model are bending of the DNA double helix and contact of operator sites with repressor domains bearing sequence homologies with the helix - turn - helix ( HTH ) motifs of other DNA - binding proteins .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None