1840
By DNase I footprint analysis of the PNR element , a palindrome of two high - affinity Ets - binding sites ( CTTCCCTGGAAG ) was identified .
 GENE: DNase I; GENE: Ets - 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: DNase I; GENE: Ets - binding sites