2225
Some of these DNA : protein complexes were also present , but at lower levels , in nuclear extracts from untransformed rat cells suggesting the possible involvement of cellular factors in the mechanism of down - regulation mediated by Ad12 E1A .
 GENE: Ad12 E1A
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: Ad12 E1A