915
By in vitro immunoprecipitations and gel shift assays , we identified two classes of high affinity Engrailed - binding sites upstream of each of the two polyhomeotic transcription units .
 GENE: Engrailed - binding sites
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: Engrailed - binding sites