29609
MYCN was found to recruit HDAC2 in the same complexes to the miR - 183 promoter , and HDAC2 depletion enhanced promoter - associated histone H4 pan - acetylation , suggesting epigenetic changes preceded transcriptional activation .
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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